50 changed files with 497 additions and 1742 deletions
--- a/.gitignore
+++ b/.gitignore
@ -10,4 +10,3 @@ lib
 *.tar.gz
 .eslintcache
 .tmp
-tmp/
--- a/.ts-eslintrc.js
+++ b/.ts-eslintrc.js
@ -19,7 +19,6 @@ module.exports = {
    ],
    rules: {
        "@typescript-eslint/no-floating-promises": 2,
-        "@typescript-eslint/no-misused-promises": 2,
-        "semi": ["error", "always"]
+        "@typescript-eslint/no-misused-promises": 2
    }
 };
--- a/.woodpecker.yml
+++ b/.woodpecker.yml
@ -1,18 +0,0 @@
-pipeline:
-    buildfrontend:
-        image: node:16
-        commands:
-            - yarn install --prefer-offline --frozen-lockfile
-            - yarn test
-            - yarn run lint-ci
-            - yarn run tsc
-            - yarn build
-
-    deploy:
-        image: python
-        when:
-            event: push
-            branch: master
-        commands:
-            - make ci-deploy
-        secrets: [ GITEA_WRITE_DEPLOY_KEY, LIBREPAGES_DEPLOY_SECRET ]
--- a/14
+++ b/14
@ -1,14 +0,0 @@
-ci-deploy: ## Deploy from CI/CD. Only call from within CI
-	@if [ "${CI}" != "woodpecker" ]; \
-	then echo "Only call from within CI. Will re-write your local Git configuration. To override, set export CI=woodpecker"; \
-		 exit 1; \
-	fi
-	git config --global user.email "${CI_COMMIT_AUTHOR_EMAIL}"
-	git config --global user.name "${CI_COMMIT_AUTHOR}"
-	./scripts/ci.sh --commit-files librepages target "${CI_COMMIT_AUTHOR} <${CI_COMMIT_AUTHOR_EMAIL}>"
-	./scripts/ci.sh --init "$$GITEA_WRITE_DEPLOY_KEY"
-	./scripts/ci.sh --deploy ${LIBREPAGES_DEPLOY_SECRET}  librepages
-	./scripts/ci.sh --clean
-
-help: ## Prints help for targets with comments
-	@cat $(MAKEFILE_LIST) | grep -E '^[a-zA-Z_-]+:.*?## .*$$' | awk 'BEGIN {FS = ":.*?## "}; {printf "\033[36m%-30s\033[0m %s\n", $$1, $$2}'
--- a/README.md
+++ b/README.md
@ -1,5 +1,3 @@
-[![status-badge](https://ci.batsense.net/api/badges/mystiq/hydrogen-web/status.svg)](https://ci.batsense.net/mystiq/hydrogen-web)
-
 # Hydrogen

 A minimal [Matrix](https://matrix.org/) chat client, focused on performance, offline functionality, and broad browser support. This is work in progress and not yet ready for primetime. Bug reports are welcome, but please don't file any feature requests or other missing things to be on par with Element Web.
--- a/doc/IMPORT-ISSUES.md
+++ b/doc/IMPORT-ISSUES.md
@ -1,11 +0,0 @@
-## How to import common-js dependency using ES6 syntax
---
-Until [#6632](https://github.com/vitejs/vite/issues/6632) is fixed, such imports should be done as follows:
-
-```ts
-import * as pkg from "off-color";
-// @ts-ignore 
-const offColor = pkg.offColor ?? pkg.default.offColor;
-```
-
-This way build, dev server and unit tests should all work.
--- a/doc/THEMING.md
+++ b/doc/THEMING.md
@ -167,38 +167,3 @@ To find the theme-id of some theme, you can look at the built-asset section of t
 This default theme will render as "Default" option in the theme-chooser dropdown. If the device preference is for dark theme, the dark default is selected and vice versa.

 **You'll need to reload twice so that Hydrogen picks up the config changes!**
-
-# Derived Theme(Collection)
-This allows users to theme Hydrogen without the need for rebuilding. Derived theme collections can be thought of as extensions (derivations) of some existing build time theme. 
-
-## Creating a derived theme:
-Here's how you create a new derived theme:
-1. You create a new theme manifest file (eg: theme-awesome.json) and mention which build time theme you're basing your new theme on using the `extends` field. The base css file of the mentioned theme is used for your new theme.
-2. You configure the theme manifest as usual by populating the `variants` field with your desired colors.
-3. You add your new theme manifest to the list of themes in `config.json`.
-
-Refresh Hydrogen twice (once to refresh cache, and once to load) and the new theme should show up in the theme chooser.
-
-## How does it work?
-
-For every theme collection in hydrogen, the build process emits a runtime css file which like the built theme css file contains variables in the css code. But unlike the theme css file, the runtime css file lacks the definition for these variables:
-
-CSS for the built theme:
-```css
-:root {
-    --background-color-primary: #f2f20f;
-}
-
-body {
-    background-color: var(--background-color-primary);
-}
-```
-and the corresponding runtime theme:
-```css
-/* Notice the lack of definiton for --background-color-primary here! */
-body {
-    background-color: var(--background-color-primary);
-}
-```
-
-When hydrogen loads a derived theme, it takes the runtime css file of the extended theme and dynamically adds the variable definition based on the values specified in the manifest. Icons are also colored dynamically and injected as variables using Data URIs.
--- a/package.json
+++ b/package.json
@ -1,6 +1,6 @@
 {
  "name": "hydrogen-web",
-  "version": "0.3.1",
+  "version": "0.2.33",
  "description": "A javascript matrix client prototype, trying to minize RAM usage by offloading as much as possible to IndexedDB",
  "directories": {
    "doc": "doc"
@ -50,9 +50,8 @@
    "postcss-flexbugs-fixes": "^5.0.2",
    "postcss-value-parser": "^4.2.0",
    "regenerator-runtime": "^0.13.7",
-    "svgo": "^2.8.0",
    "text-encoding": "^0.7.0",
-    "typescript": "^4.7.0",
+    "typescript": "^4.3.5",
    "vite": "^2.9.8",
    "xxhashjs": "^0.2.2"
  },
--- a/scripts/build-plugins/rollup-plugin-build-themes.js
+++ b/scripts/build-plugins/rollup-plugin-build-themes.js
@ -14,10 +14,10 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 const path = require('path').posix;
-const {optimize} = require('svgo');

 async function readCSSSource(location) {
    const fs = require("fs").promises;
+    const path = require("path");
    const resolvedLocation = path.resolve(__dirname, "../../", `${location}/theme.css`);
    const data = await fs.readFile(resolvedLocation);
    return data;
@ -43,45 +43,6 @@ function addThemesToConfig(bundle, manifestLocations, defaultThemes) {
    }
 }

-/**
- * Returns an object where keys are the svg file names and the values
- * are the svg code (optimized)
- * @param {*} icons Object where keys are css variable names and values are locations of the svg
- * @param {*} manifestLocation Location of manifest used for resolving path 
- */
-async function generateIconSourceMap(icons, manifestLocation) {
-    const sources = {};
-    const fileNames = [];
-    const promises = [];
-    const fs = require("fs").promises;
-    for (const icon of Object.values(icons)) {
-        const [location] = icon.split("?");
-        // resolve location against manifestLocation
-        const resolvedLocation = path.resolve(manifestLocation, location);
-        const iconData = fs.readFile(resolvedLocation);
-        promises.push(iconData);
-        const fileName = path.basename(resolvedLocation);
-        fileNames.push(fileName);
-    }
-    const results = await Promise.all(promises);
-    for (let i = 0; i < results.length; ++i)  {
-        const svgString = results[i].toString();
-        const result = optimize(svgString, {
-            plugins: [
-                {
-                    name: "preset-default",
-                    params: {
-                        overrides: { convertColors: false, },
-                    },
-                },
-            ],
-        });
-        const optimizedSvgString = result.data;
-        sources[fileNames[i]] = optimizedSvgString;
-    }
-    return sources;
-}
-
 /**
 * Returns a mapping from location (of manifest file) to an array containing all the chunks (of css files) generated from that location.
 * To understand what chunk means in this context, see https://rollupjs.org/guide/en/#generatebundle.
@ -317,7 +278,7 @@ module.exports = function buildThemes(options) {
            ];
 },

-        async generateBundle(_, bundle) {
+        generateBundle(_, bundle) {
            const assetMap = getMappingFromFileNameToAssetInfo(bundle);
            const chunkMap = getMappingFromLocationToChunkArray(bundle);
            const runtimeThemeChunkMap = getMappingFromLocationToRuntimeChunk(bundle);
@ -338,29 +299,13 @@ module.exports = function buildThemes(options) {
                    const locationRelativeToManifest = path.relative(manifestLocation, locationRelativeToBuildRoot);
                    builtAssets[`${name}-${variant}`] = locationRelativeToManifest;
                }
-                // Emit the base svg icons as asset
-                const nameToAssetHashedLocation = [];
-                const nameToSource = await generateIconSourceMap(icon, location);
-                for (const [name, source] of Object.entries(nameToSource)) {
-                    const ref = this.emitFile({ type: "asset", name, source });
-                    const assetHashedName = this.getFileName(ref);
-                    nameToAssetHashedLocation[name] = assetHashedName;
-                }
-                // Update icon section in output manifest with paths to the icon in build output 
-                for (const [variable, location] of Object.entries(icon)) {
-                    const [locationWithoutQueryParameters, queryParameters] = location.split("?");
-                    const name = path.basename(locationWithoutQueryParameters);
-                    const locationRelativeToBuildRoot = nameToAssetHashedLocation[name];
-                    const locationRelativeToManifest = path.relative(manifestLocation, locationRelativeToBuildRoot);
-                    icon[variable] = `${locationRelativeToManifest}?${queryParameters}`;
-                }
                const runtimeThemeChunk = runtimeThemeChunkMap.get(location);
                const runtimeAssetLocation = path.relative(manifestLocation, assetMap.get(runtimeThemeChunk.fileName).fileName); 
                manifest.source = {
                    "built-assets": builtAssets,
                    "runtime-asset": runtimeAssetLocation,
                    "derived-variables": derivedVariables,
-                    "icon": icon,
+                    "icon": icon
                };
                const name = `theme-${themeKey}.json`;
                manifestLocations.push(`${manifestLocation}/${name}`);
--- a/scripts/ci.sh
+++ b/scripts/ci.sh
@ -1,165 +0,0 @@
-#!/bin/bash
-# ci.sh: Helper script to automate deployment operations on CI/CD
-# Copyright © 2022 Aravinth Manivannan <realaravinth@batsense.net>
-# 
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU Affero General Public License as
-# published by the Free Software Foundation, either version 3 of the
-# License, or (at your option) any later version.
-# 
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU Affero General Public License for more details.
-# 
-# You should have received a copy of the GNU Affero General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
-
-set -xEeuo  pipefail
-#source $(pwd)/scripts/lib.sh
-
-readonly SSH_ID_FILE=/tmp/ci-ssh-id
-readonly SSH_REMOTE_NAME=origin-ssh
-readonly PROJECT_ROOT=$(pwd)
-
-match_arg() {
-    if [ $1 == $2 ] || [ $1 == $3 ]
-    then
-        return 0
-    else
-        return 1
-    fi
-}
-
-help() {
-	cat << EOF
-USAGE: ci.sh [SUBCOMMAND]
-Helper script to automate deployment operations on CI/CD
-
-Subcommands
-
-  -c  --clean	cleanup secrets, SSH key and other runtime data
-  -i  --init <SSH_PRIVATE_KEY>	initialize environment, write SSH private to file
-  -d  --deploy <PAGES-SECRET> <TARGET BRANCH>	push branch to Gitea and call Pages server
-  -h  --help	print this help menu
-EOF
-}
-
-# $1: SSH private key
-write_ssh(){
-	truncate --size 0 $SSH_ID_FILE
-	echo "$1" > $SSH_ID_FILE
-	chmod 600 $SSH_ID_FILE
-}
-
-set_ssh_remote() {
-	http_remote_url=$(git remote get-url origin)
-	remote_hostname=$(echo $http_remote_url | cut -d '/' -f 3) 
-	repository_owner=$(echo $http_remote_url | cut -d '/' -f 4)
-	repository_name=$(echo $http_remote_url | cut -d '/' -f 5)
-	ssh_remote="git@$remote_hostname:$repository_owner/$repository_name"
-	ssh_remote="git@git.batsense.net:mystiq/hydrogen-web.git"
-	git remote add $SSH_REMOTE_NAME $ssh_remote
-}
-
-clean() {
-	if [ -f $SSH_ID_FILE ]
-	then
-		shred $SSH_ID_FILE
-		rm $SSH_ID_FILE
-	fi
-}
-
-# $1: branch name
-# $2: directory containing build assets
-# $3: Author in <author-name author@example.com> format
-commit_files() {
-	cd $PROJECT_ROOT
-	original_branch=$(git branch --show-current)
-	tmp_dir=$(mktemp -d)
-	cp -r $2/* $tmp_dir
-
-	if [[ -z $(git ls-remote --heads origin ${1}) ]]
-	then
-		echo "[*] Creating deployment branch $1"
-		git checkout --orphan $1
-	else
-		echo "[*] Deployment branch $1 exists, pulling changes from remote"
-		git fetch origin $1
-		git switch $1 
-	fi
-
-	git rm -rf .
-	/bin/rm -rf *
-	cp -r $tmp_dir/* .
-	git add --all
-	if [ $(git status --porcelain | xargs | sed '/^$/d' | wc -l) -gt 0 ];
-	then
-		echo "[*] Repository has changed, committing changes"
-		git commit \
-			--author="$3" \
-			--message="new deploy: $(date --iso-8601=seconds)"
-	fi
-	git checkout $original_branch
-}
-
-# $1: Pages API secret
-# $2: Deployment target branch
-deploy() {
-	if (( "$#" < 2 ))
-	then
-		help
-	else
-		git -c core.sshCommand="/usr/bin/ssh -oStrictHostKeyChecking=no -i $SSH_ID_FILE"\
-			push --force  $SSH_REMOTE_NAME $2
-		curl -vv --location --request \
-				POST "https://deploy.batsense.net/api/v1/update"\
-				--header 'Content-Type: application/json' \
-				--data-raw "{ \"secret\": \"$1\", \"branch\": \"$2\" }"
-	fi
-}
-
-if (( "$#" < 1 ))
-then
-	help
-	exit -1
-fi
-
-
-if match_arg $1 '-i' '--init'
-then
-	if (( "$#" < 2 ))
-	then
-		help
-		exit -1
-	fi
-	set_ssh_remote
-	write_ssh "$2"
-elif match_arg $1 '-c' '--clean'
-then
-	clean
-elif match_arg $1 '-cf' '--commit-files'
-then
-	if (( "$#" < 4 ))
-	then
-		help
-		exit -1
-	fi
-    commit_files $2 $3 $4
-elif match_arg $1 '-d' '--deploy'
-then
-	if (( "$#" < 3 ))
-	then
-		help
-		exit -1
-	fi
-	deploy $2 $3
-elif match_arg $1 '-h' '--help'
-then
-	help
-else
-	help
-fi
-
-
-
--- a/src/platform/web/theming/shared/color.mjs
+++ b/src/platform/web/theming/shared/color.mjs
@ -13,10 +13,10 @@ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.
 */
-import * as pkg from 'off-color';
-const offColor = pkg.offColor ?? pkg.default.offColor;

-export function derive(value, operation, argument, isDark) {
+const offColor = require("off-color").offColor;
+
+module.exports.derive = function (value, operation, argument, isDark) {
    const argumentAsNumber = parseInt(argument);
    if (isDark) {
        // For dark themes, invert the operation
--- a/scripts/postcss/css-url-to-variables.js
+++ b/scripts/postcss/css-url-to-variables.js
@ -81,8 +81,7 @@ module.exports = (opts = {}) => {
            const urlVariables = new Map();
            const counter = createCounter();
            root.walkDecls(decl => findAndReplaceUrl(decl, urlVariables, counter));
-            const cssFileLocation = root.source.input.from;
-            if (urlVariables.size && !cssFileLocation.includes("type=runtime")) {
+            if (urlVariables.size) {
                addResolvedVariablesToRootSelector(root, { Rule, Declaration }, urlVariables);
            }
            if (opts.compiledVariables){
--- a/scripts/postcss/svg-colorizer.js
+++ b/scripts/postcss/svg-colorizer.js
@ -14,13 +14,12 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */

-import {readFileSync, mkdirSync, writeFileSync} from "fs";
-import {resolve} from "path";
-import {h32} from "xxhashjs";
-import {getColoredSvgString} from "../../src/platform/web/theming/shared/svg-colorizer.mjs";
+const fs = require("fs");
+const path = require("path");
+const xxhash = require('xxhashjs');

 function createHash(content) {
-    const hasher = new h32(0);
+    const hasher = new xxhash.h32(0);
    hasher.update(content);
    return hasher.digest();
 }
@ -31,14 +30,18 @@ function createHash(content) {
 * @param {string} primaryColor Primary color for the new svg
 * @param {string} secondaryColor Secondary color for the new svg
 */
-export function buildColorizedSVG(svgLocation, primaryColor, secondaryColor) {
-    const svgCode = readFileSync(svgLocation, { encoding: "utf8"});
-    const coloredSVGCode = getColoredSvgString(svgCode, primaryColor, secondaryColor);
+module.exports.buildColorizedSVG = function (svgLocation, primaryColor, secondaryColor) {
+    const svgCode = fs.readFileSync(svgLocation, { encoding: "utf8"});
+    let coloredSVGCode = svgCode.replaceAll("#ff00ff", primaryColor);
+    coloredSVGCode = coloredSVGCode.replaceAll("#00ffff", secondaryColor);
+    if (svgCode === coloredSVGCode) {
+        throw new Error("svg-colorizer made no color replacements! The input svg should only contain colors #ff00ff (primary, case-sensitive) and #00ffff (secondary, case-sensitive).");
+    }
    const fileName = svgLocation.match(/.+[/\\](.+\.svg)/)[1];
    const outputName = `${fileName.substring(0, fileName.length - 4)}-${createHash(coloredSVGCode)}.svg`;
-    const outputPath = resolve(__dirname, "./.tmp");
+    const outputPath = path.resolve(__dirname, "../../.tmp");
    try {
-       mkdirSync(outputPath);
+       fs.mkdirSync(outputPath);
    }
    catch (e) {
        if (e.code !== "EEXIST") {
@ -46,6 +49,6 @@ export function buildColorizedSVG(svgLocation, primaryColor, secondaryColor) {
        }
    }
    const outputFile = `${outputPath}/${outputName}`;
-    writeFileSync(outputFile, coloredSVGCode);
+    fs.writeFileSync(outputFile, coloredSVGCode);
    return outputFile;
 }
--- a/scripts/sdk/base-manifest.json
+++ b/scripts/sdk/base-manifest.json
@ -1,7 +1,7 @@
 {
    "name": "hydrogen-view-sdk",
    "description": "Embeddable matrix client library, including view components",
-    "version": "0.1.0",
+    "version": "0.0.15",
    "main": "./lib-build/hydrogen.cjs.js",
    "exports": {
        ".": {
--- a/scripts/test-derived-theme/test-theme.sh
+++ b/scripts/test-derived-theme/test-theme.sh
@ -1,5 +0,0 @@
-#!/bin/sh
-cp scripts/test-derived-theme/theme.json target/assets/theme-customer.json
-cat target/config.json | jq '.themeManifests += ["assets/theme-customer.json"]' | cat > target/config.temp.json
-rm target/config.json
-mv target/config.temp.json target/config.json
--- a/scripts/test-derived-theme/theme.json
+++ b/scripts/test-derived-theme/theme.json
@ -1,51 +0,0 @@
-{
-	"name": "Customer",
-    "extends": "element",
-    "id": "customer",
-	"values": {
-        "variants": {
-            "dark": {
-                "dark": true,
-                "default": true,
-                "name": "Dark",
-                "variables": {
-                    "background-color-primary": "#21262b",
-                    "background-color-secondary": "#2D3239",
-                    "text-color": "#fff",
-                    "accent-color": "#F03F5B",
-                    "error-color": "#FF4B55",
-                    "fixed-white": "#fff",
-                    "room-badge": "#61708b",
-                    "link-color": "#238cf5"
-                }
-            },
-            "light": {
-                "default": true,
-                "name": "Dark",
-                "variables": {
-                    "background-color-primary": "#21262b",
-                    "background-color-secondary": "#2D3239",
-                    "text-color": "#fff",
-                    "accent-color": "#F03F5B",
-                    "error-color": "#FF4B55",
-                    "fixed-white": "#fff",
-                    "room-badge": "#61708b",
-                    "link-color": "#238cf5"
-                }
-            },
-            "red": {
-                "name": "Gruvbox",
-                "variables": {
-                    "background-color-primary": "#282828",
-                    "background-color-secondary": "#3c3836",
-                    "text-color": "#fbf1c7",
-                    "accent-color": "#8ec07c",
-                    "error-color": "#fb4934",
-                    "fixed-white": "#fff",
-                    "room-badge": "#cc241d",
-                    "link-color": "#fe8019"
-                }
-            }
-        }
-    }
-}
--- a/src/domain/LogoutViewModel.ts
+++ b/src/domain/LogoutViewModel.ts
@ -14,19 +14,18 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */

-import {Options as BaseOptions, ViewModel} from "./ViewModel";
+import {Options, ViewModel} from "./ViewModel";
 import {Client} from "../matrix/Client.js";
-import {SegmentType} from "./navigation/index";

-type Options = { sessionId: string; } & BaseOptions;
+type LogoutOptions = { sessionId: string; } & Options;

-export class LogoutViewModel extends ViewModel<SegmentType, Options> {
+export class LogoutViewModel extends ViewModel<LogoutOptions> {
    private _sessionId: string;
    private _busy: boolean;
    private _showConfirm: boolean;
    private _error?: Error;

-    constructor(options: Options) {
+    constructor(options: LogoutOptions) {
        super(options);
        this._sessionId = options.sessionId;
        this._busy = false;
@ -42,7 +41,7 @@ export class LogoutViewModel extends ViewModel<SegmentType, Options> {
        return this._busy;
    }

-    get cancelUrl(): string | undefined {
+    get cancelUrl(): string {
        return this.urlCreator.urlForSegment("session", true);
    }

--- a/src/domain/RootViewModel.js
+++ b/src/domain/RootViewModel.js
@ -17,7 +17,7 @@ limitations under the License.
 import {Client} from "../matrix/Client.js";
 import {SessionViewModel} from "./session/SessionViewModel.js";
 import {SessionLoadViewModel} from "./SessionLoadViewModel.js";
-import {LoginViewModel} from "./login/LoginViewModel";
+import {LoginViewModel} from "./login/LoginViewModel.js";
 import {LogoutViewModel} from "./LogoutViewModel";
 import {SessionPickerViewModel} from "./SessionPickerViewModel.js";
 import {ViewModel} from "./ViewModel";
--- a/src/domain/ViewModel.ts
+++ b/src/domain/ViewModel.ts
@ -27,19 +27,17 @@ import type {Platform} from "../platform/web/Platform";
 import type {Clock} from "../platform/web/dom/Clock";
 import type {ILogger} from "../logging/types";
 import type {Navigation} from "./navigation/Navigation";
-import type {SegmentType} from "./navigation/index";
-import type {IURLRouter} from "./navigation/URLRouter";
+import type {URLRouter} from "./navigation/URLRouter";

-export type Options<T extends object = SegmentType> = {
-    platform: Platform;
-    logger: ILogger;
-    urlCreator: IURLRouter<T>;
-    navigation: Navigation<T>;
-    emitChange?: (params: any) => void;
+export type Options = {
+    platform: Platform
+    logger: ILogger
+    urlCreator: URLRouter
+    navigation: Navigation
+    emitChange?: (params: any) => void
 }

-
-export class ViewModel<N extends object = SegmentType, O extends Options<N> = Options<N>> extends EventEmitter<{change: never}> {
+export class ViewModel<O extends Options = Options> extends EventEmitter<{change: never}> {
    private disposables?: Disposables;
    private _isDisposed = false;
    private _options: Readonly<O>;
@ -49,7 +47,7 @@ export class ViewModel<N extends object = SegmentType, O extends Options<N> = Op
        this._options = options;
    }

-    childOptions<T extends Object>(explicitOptions: T): T & Options<N> {
+    childOptions<T extends Object>(explicitOptions: T): T & Options {
        return Object.assign({}, this._options, explicitOptions);
    }

@ -60,11 +58,11 @@ export class ViewModel<N extends object = SegmentType, O extends Options<N> = Op
        return this._options[name];
    }

-    observeNavigation<T extends keyof N>(type: T, onChange: (value: N[T], type: T) => void): void {
+    observeNavigation(type: string, onChange: (value: string | true | undefined, type: string) => void) {
      const segmentObservable = this.navigation.observe(type);
-      const unsubscribe = segmentObservable.subscribe((value: N[T]) => {
+      const unsubscribe = segmentObservable.subscribe((value: string | true | undefined) => {
        onChange(value, type);
-      });
+      })
      this.track(unsubscribe);
    }

@ -105,7 +103,7 @@ export class ViewModel<N extends object = SegmentType, O extends Options<N> = Op
    // 
    // translated string should probably always be bindings, unless we're fine with a refresh when changing the language?
    // we probably are, if we're using routing with a url, we could just refresh.
-    i18n(parts: TemplateStringsArray, ...expr: any[]): string {
+    i18n(parts: TemplateStringsArray, ...expr: any[]) {
        // just concat for now
        let result = "";
        for (let i = 0; i < parts.length; ++i) {
@ -137,12 +135,11 @@ export class ViewModel<N extends object = SegmentType, O extends Options<N> = Op
        return this.platform.logger;
    }

-    get urlCreator(): IURLRouter<N> {
+    get urlCreator(): URLRouter {
        return this._options.urlCreator;
    }

-    get navigation(): Navigation<N> {
-        // typescript needs a little help here
-        return this._options.navigation as unknown as Navigation<N>;
+    get navigation(): Navigation {
+        return this._options.navigation;
    }
 }
--- a/src/domain/login/LoginViewModel.js
+++ b/src/domain/login/LoginViewModel.js
@ -15,145 +15,101 @@ limitations under the License.
 */

 import {Client} from "../../matrix/Client.js";
-import {Options as BaseOptions, ViewModel} from "../ViewModel";
+import {ViewModel} from "../ViewModel";
 import {PasswordLoginViewModel} from "./PasswordLoginViewModel.js";
 import {StartSSOLoginViewModel} from "./StartSSOLoginViewModel.js";
 import {CompleteSSOLoginViewModel} from "./CompleteSSOLoginViewModel.js";
 import {LoadStatus} from "../../matrix/Client.js";
 import {SessionLoadViewModel} from "../SessionLoadViewModel.js";
-import {SegmentType} from "../navigation/index";

-import type {PasswordLoginMethod, SSOLoginHelper, TokenLoginMethod, ILoginMethod} from "../../matrix/login";
-
-type Options = {
-    defaultHomeserver: string;
-    ready: ReadyFn;
-    loginToken?: string;
-} & BaseOptions;
-
-export class LoginViewModel extends ViewModel<SegmentType, Options> {
-    private _ready: ReadyFn;
-    private _loginToken?: string;
-    private _client: Client;
-    private _loginOptions?: LoginOptions;
-    private _passwordLoginViewModel?: PasswordLoginViewModel;
-    private _startSSOLoginViewModel?: StartSSOLoginViewModel;
-    private _completeSSOLoginViewModel?: CompleteSSOLoginViewModel;
-    private _loadViewModel?: SessionLoadViewModel;
-    private _loadViewModelSubscription?: () => void;
-    private _homeserver: string;
-    private _queriedHomeserver?: string;
-    private _abortHomeserverQueryTimeout?: () => void;
-    private _abortQueryOperation?: () => void;
-
-    private _hideHomeserver: boolean = false;
-    private _isBusy: boolean = false;
-    private _errorMessage: string = "";
-
-    constructor(options: Readonly<Options>) {
+export class LoginViewModel extends ViewModel {
+    constructor(options) {
        super(options);
        const {ready, defaultHomeserver, loginToken} = options;
        this._ready = ready;
        this._loginToken = loginToken;
        this._client = new Client(this.platform);
+        this._loginOptions = null;
+        this._passwordLoginViewModel = null;
+        this._startSSOLoginViewModel = null;
+        this._completeSSOLoginViewModel = null;
+        this._loadViewModel = null;
+        this._loadViewModelSubscription = null;
        this._homeserver = defaultHomeserver;
+        this._queriedHomeserver = null;
+        this._errorMessage = "";
+        this._hideHomeserver = false;
+        this._isBusy = false;
+        this._abortHomeserverQueryTimeout = null;
+        this._abortQueryOperation = null;
        this._initViewModels();
    }

-    get passwordLoginViewModel(): PasswordLoginViewModel {
-        return this._passwordLoginViewModel;
-    }
+    get passwordLoginViewModel() { return this._passwordLoginViewModel; }
+    get startSSOLoginViewModel() { return this._startSSOLoginViewModel; }
+    get completeSSOLoginViewModel(){ return this._completeSSOLoginViewModel; }
+    get homeserver() { return this._homeserver; }
+    get resolvedHomeserver() { return this._loginOptions?.homeserver; }
+    get errorMessage() { return this._errorMessage; }
+    get showHomeserver() { return !this._hideHomeserver; }
+    get loadViewModel() {return this._loadViewModel; }
+    get isBusy() { return this._isBusy; }
+    get isFetchingLoginOptions() { return !!this._abortQueryOperation; }

-    get startSSOLoginViewModel(): StartSSOLoginViewModel {
-        return this._startSSOLoginViewModel;
-    }
-
-    get completeSSOLoginViewModel(): CompleteSSOLoginViewModel {
-        return this._completeSSOLoginViewModel;
-    }
-
-    get homeserver(): string {
-        return this._homeserver;
-    }
-
-    get resolvedHomeserver(): string | undefined {
-        return this._loginOptions?.homeserver;
-    }
-
-    get errorMessage(): string {
-        return this._errorMessage;
-    }
-
-    get showHomeserver(): boolean {
-        return !this._hideHomeserver;
-    }
-
-    get loadViewModel(): SessionLoadViewModel {
-        return this._loadViewModel;
-    }
-
-    get isBusy(): boolean {
-        return this._isBusy;
-    }
-
-    get isFetchingLoginOptions(): boolean {
-        return !!this._abortQueryOperation;
-    }
-
-    goBack(): void {
+    goBack() {
        this.navigation.push("session");
    }

-    private _initViewModels(): void {
+    async _initViewModels() {
        if (this._loginToken) {
            this._hideHomeserver = true;
            this._completeSSOLoginViewModel = this.track(new CompleteSSOLoginViewModel(
                this.childOptions(
                    {
                        client: this._client,
-                        attemptLogin: (loginMethod: TokenLoginMethod) => this.attemptLogin(loginMethod),
+                        attemptLogin: loginMethod => this.attemptLogin(loginMethod),
                        loginToken: this._loginToken
                    })));
            this.emitChange("completeSSOLoginViewModel");
        }
        else {
-            void this.queryHomeserver();
+            await this.queryHomeserver();
        }
    }

-    private _showPasswordLogin(): void {
+    _showPasswordLogin() {
        this._passwordLoginViewModel = this.track(new PasswordLoginViewModel(
            this.childOptions({
                loginOptions: this._loginOptions,
-                attemptLogin: (loginMethod: PasswordLoginMethod) => this.attemptLogin(loginMethod)
+                attemptLogin: loginMethod => this.attemptLogin(loginMethod)
        })));
        this.emitChange("passwordLoginViewModel");
    }

-    private _showSSOLogin(): void {
+    _showSSOLogin() {
        this._startSSOLoginViewModel = this.track(
            new StartSSOLoginViewModel(this.childOptions({loginOptions: this._loginOptions}))
        );
        this.emitChange("startSSOLoginViewModel");
    }

-    private _showError(message: string): void {
+    _showError(message) {
        this._errorMessage = message;
        this.emitChange("errorMessage");
    }

-    private _setBusy(status: boolean): void {
+    _setBusy(status) {
        this._isBusy = status;
        this._passwordLoginViewModel?.setBusy(status);
        this._startSSOLoginViewModel?.setBusy(status);
        this.emitChange("isBusy");
    }

-    async attemptLogin(loginMethod: ILoginMethod): Promise<null> {
+    async attemptLogin(loginMethod) {
        this._setBusy(true);
-        void this._client.startWithLogin(loginMethod, {inspectAccountSetup: true});
+        this._client.startWithLogin(loginMethod, {inspectAccountSetup: true});
        const loadStatus = this._client.loadStatus;
-        const handle = loadStatus.waitFor((status: LoadStatus) => status !== LoadStatus.Login);
+        const handle = loadStatus.waitFor(status => status !== LoadStatus.Login);
        await handle.promise;
        this._setBusy(false);
        const status = loadStatus.get();
@ -163,11 +119,11 @@ export class LoginViewModel extends ViewModel<SegmentType, Options> {
        this._hideHomeserver = true;
        this.emitChange("hideHomeserver");
        this._disposeViewModels();
-        void this._createLoadViewModel();
+        this._createLoadViewModel();
        return null;
    }

-    private _createLoadViewModel(): void {
+    _createLoadViewModel() {
        this._loadViewModelSubscription = this.disposeTracked(this._loadViewModelSubscription);
        this._loadViewModel = this.disposeTracked(this._loadViewModel);
        this._loadViewModel = this.track(
@ -183,7 +139,7 @@ export class LoginViewModel extends ViewModel<SegmentType, Options> {
                })
            )
        );
-        void this._loadViewModel.start();
+        this._loadViewModel.start();
        this.emitChange("loadViewModel");
        this._loadViewModelSubscription = this.track(
            this._loadViewModel.disposableOn("change", () => {
@ -195,22 +151,22 @@ export class LoginViewModel extends ViewModel<SegmentType, Options> {
        );
    }

-    private _disposeViewModels(): void {
-        this._startSSOLoginViewModel = this.disposeTracked(this._startSSOLoginViewModel);
+    _disposeViewModels() {
+        this._startSSOLoginViewModel = this.disposeTracked(this._ssoLoginViewModel);
        this._passwordLoginViewModel = this.disposeTracked(this._passwordLoginViewModel);
        this._completeSSOLoginViewModel = this.disposeTracked(this._completeSSOLoginViewModel);
        this.emitChange("disposeViewModels");
    }

-    async setHomeserver(newHomeserver: string): Promise<void> {
+    async setHomeserver(newHomeserver) {
        this._homeserver = newHomeserver;
        // clear everything set by queryHomeserver
-        this._loginOptions = undefined;
-        this._queriedHomeserver = undefined;
+        this._loginOptions = null;
+        this._queriedHomeserver = null;
        this._showError("");
        this._disposeViewModels();
        this._abortQueryOperation = this.disposeTracked(this._abortQueryOperation);
-        this.emitChange("loginViewModels"); // multiple fields changing
+        this.emitChange(); // multiple fields changing
        // also clear the timeout if it is still running
        this.disposeTracked(this._abortHomeserverQueryTimeout);
        const timeout = this.clock.createTimeout(1000);
@ -225,10 +181,10 @@ export class LoginViewModel extends ViewModel<SegmentType, Options> {
            }
        }
        this._abortHomeserverQueryTimeout = this.disposeTracked(this._abortHomeserverQueryTimeout);
-        void this.queryHomeserver();
+        this.queryHomeserver();
    }
    
-    async queryHomeserver(): Promise<void> {
+    async queryHomeserver() {
        // don't repeat a query we've just done
        if (this._homeserver === this._queriedHomeserver || this._homeserver === "") {
            return;
@ -254,7 +210,7 @@ export class LoginViewModel extends ViewModel<SegmentType, Options> {
            if (e.name === "AbortError") {
                return; //aborted, bail out
            } else {
-                this._loginOptions = undefined;
+                this._loginOptions = null;
            }
        } finally {
            this._abortQueryOperation = this.disposeTracked(this._abortQueryOperation);
@ -272,22 +228,12 @@ export class LoginViewModel extends ViewModel<SegmentType, Options> {
        }
    }

-    dispose(): void {
+    dispose() {
        super.dispose();
        if (this._client) {
            // if we move away before we're done with initial sync
            // delete the session
-            void this._client.deleteSession();
+            this._client.deleteSession();
        }
    }
 }
-
-type ReadyFn = (client: Client) => void;
-
-// TODO: move to Client.js when its converted to typescript.
-type LoginOptions = {
-    homeserver: string;
-    password?: (username: string, password: string) => PasswordLoginMethod;
-    sso?: SSOLoginHelper;
-    token?: (loginToken: string) => TokenLoginMethod;
-};
--- a/src/domain/navigation/Navigation.js
+++ b/src/domain/navigation/Navigation.js
@ -16,49 +16,27 @@ limitations under the License.

 import {BaseObservableValue, ObservableValue} from "../../observable/ObservableValue";

-
-type AllowsChild<T> = (parent: Segment<T> | undefined, child: Segment<T>) => boolean;
-
-/**
- * OptionalValue is basically stating that if SegmentType[type] = true:
- * - Allow this type to be optional
- * - Give it a default value of undefined
- * - Also allow it to be true
- * This lets us do:
- * const s: Segment<SegmentType> = new Segment("create-room");
- * instead of
- * const s: Segment<SegmentType> = new Segment("create-room", undefined);
- */
-export type OptionalValue<T> = T extends true? [(undefined | true)?]: [T];
-
-export class Navigation<T extends object> {
-    private readonly _allowsChild: AllowsChild<T>;
-    private _path: Path<T>;
-    private readonly _observables: Map<keyof T, SegmentObservable<T>> = new Map();
-    private readonly _pathObservable: ObservableValue<Path<T>>;
-
-    constructor(allowsChild: AllowsChild<T>) {
+export class Navigation {
+    constructor(allowsChild) {
        this._allowsChild = allowsChild;
        this._path = new Path([], allowsChild);
+        this._observables = new Map();
        this._pathObservable = new ObservableValue(this._path);
    }

-    get pathObservable(): ObservableValue<Path<T>> {
+    get pathObservable() {
        return this._pathObservable;
    }

-    get path(): Path<T> {
+    get path() {
        return this._path;
    }

-    push<K extends keyof T>(type: K, ...value: OptionalValue<T[K]>): void {
-        const newPath = this.path.with(new Segment(type, ...value));
-        if (newPath) {
-            this.applyPath(newPath);
-        }
+    push(type, value = undefined) {
+        return this.applyPath(this.path.with(new Segment(type, value)));
    }

-    applyPath(path: Path<T>): void {
+    applyPath(path) {
        // Path is not exported, so you can only create a Path through Navigation,
        // so we assume it respects the allowsChild rules
        const oldPath = this._path;
@ -82,7 +60,7 @@ export class Navigation<T extends object> {
        this._pathObservable.set(this._path);
    }

-    observe(type: keyof T): SegmentObservable<T> {
+    observe(type) {
        let observable = this._observables.get(type);
        if (!observable) {
            observable = new SegmentObservable(this, type);
@ -91,9 +69,9 @@ export class Navigation<T extends object> {
        return observable;
    }

-    pathFrom(segments: Segment<any>[]): Path<T> {
-        let parent: Segment<any> | undefined;
-        let i: number;
+    pathFrom(segments) {
+        let parent;
+        let i;
        for (i = 0; i < segments.length; i += 1) {
            if (!this._allowsChild(parent, segments[i])) {
                return new Path(segments.slice(0, i), this._allowsChild);
@ -103,12 +81,12 @@ export class Navigation<T extends object> {
        return new Path(segments, this._allowsChild);
    }

-    segment<K extends keyof T>(type: K, ...value: OptionalValue<T[K]>): Segment<T> {
-        return new Segment(type, ...value);
+    segment(type, value) {
+        return new Segment(type, value);
    }
 }

-function segmentValueEqual<T>(a?: T[keyof T], b?: T[keyof T]): boolean {
+function segmentValueEqual(a, b) {
    if (a === b) {
        return true;
    }
@ -125,29 +103,24 @@ function segmentValueEqual<T>(a?: T[keyof T], b?: T[keyof T]): boolean {
    return false;
 }

-
-export class Segment<T, K extends keyof T = any> {
-    public value: T[K];
-
-    constructor(public type: K, ...value: OptionalValue<T[K]>) {
-        this.value = (value[0] === undefined ? true : value[0]) as unknown as T[K];
+export class Segment {
+    constructor(type, value) {
+        this.type = type;
+        this.value = value === undefined ? true : value;
    }
 }

-class Path<T> {
-    private readonly _segments: Segment<T, any>[];
-    private readonly _allowsChild: AllowsChild<T>;
-
-    constructor(segments: Segment<T>[] = [], allowsChild: AllowsChild<T>) {
+class Path {
+    constructor(segments = [], allowsChild) {
        this._segments = segments;
        this._allowsChild = allowsChild;
    }

-    clone(): Path<T> {
+    clone() {
        return new Path(this._segments.slice(), this._allowsChild);
    }

-    with(segment: Segment<T>): Path<T> | undefined {
+    with(segment) {
        let index = this._segments.length - 1;
        do {
            if (this._allowsChild(this._segments[index], segment)) {
@ -159,10 +132,10 @@ class Path<T> {
            index -= 1;
        } while(index >= -1);
        // allow -1 as well so we check if the segment is allowed as root
-        return undefined;
+        return null;
    }

-    until(type: keyof T): Path<T> {
+    until(type) {
        const index = this._segments.findIndex(s => s.type === type);
        if (index !== -1) {
            return new Path(this._segments.slice(0, index + 1), this._allowsChild)
@ -170,11 +143,11 @@ class Path<T> {
        return new Path([], this._allowsChild);
    }

-    get(type: keyof T): Segment<T> | undefined {
+    get(type) {
        return this._segments.find(s => s.type === type);
    }

-    replace(segment: Segment<T>): Path<T> | undefined {
+    replace(segment) {
        const index = this._segments.findIndex(s => s.type === segment.type);
        if (index !== -1) {
            const parent = this._segments[index - 1];
@ -187,10 +160,10 @@ class Path<T> {
                }
            }
        }
-        return undefined;
+        return null;
    }

-    get segments(): Segment<T>[] {
+    get segments() {
        return this._segments;
    }
 }
@ -199,49 +172,43 @@ class Path<T> {
 * custom observable so it always returns what is in navigation.path, even if we haven't emitted the change yet.
 * This ensures that observers of a segment can also read the most recent value of other segments.
 */
-class SegmentObservable<T extends object> extends BaseObservableValue<T[keyof T] | undefined> {
-    private readonly _navigation: Navigation<T>;
-    private _type: keyof T;
-    private _lastSetValue?: T[keyof T];
-        
-    constructor(navigation: Navigation<T>, type: keyof T) {
+class SegmentObservable extends BaseObservableValue {
+    constructor(navigation, type) {
        super();
        this._navigation = navigation;
        this._type = type;
        this._lastSetValue = navigation.path.get(type)?.value;
    }

-    get(): T[keyof T] | undefined {
+    get() {
        const path = this._navigation.path;
        const segment = path.get(this._type);
        const value = segment?.value;
        return value;
    }

-    emitIfChanged(): void {
+    emitIfChanged() {
        const newValue = this.get();
-        if (!segmentValueEqual<T>(newValue, this._lastSetValue)) {
+        if (!segmentValueEqual(newValue, this._lastSetValue)) {
            this._lastSetValue = newValue;
            this.emit(newValue);
        }
    }
 }

-export type {Path};
-
 export function tests() {

    function createMockNavigation() {
        return new Navigation((parent, {type}) => {
            switch (parent?.type) {
                case undefined:
-                    return type === "1" || type === "2";
+                    return type === "1" || "2";
                case "1":
                    return type === "1.1";
                case "1.1":
                    return type === "1.1.1";
                case "2":
-                    return type === "2.1" || type === "2.2";
+                    return type === "2.1" || "2.2";
                default:
                    return false;
            }
@ -249,7 +216,7 @@ export function tests() {
    }

    function observeTypes(nav, types) {
-        const changes: {type:string, value:any}[] = [];
+        const changes = [];
        for (const type of types) {
            nav.observe(type).subscribe(value => {
                changes.push({type, value});
@ -258,12 +225,6 @@ export function tests() {
        return changes;
    }

-    type SegmentType = {
-        "foo": number;
-        "bar": number;
-        "baz": number;
-    }
-
    return {
        "applying a path emits an event on the observable": assert => {
            const nav = createMockNavigation();
@ -281,18 +242,18 @@ export function tests() {
            assert.equal(changes[1].value, 8);
        },
        "path.get": assert => {
-            const path = new Path<SegmentType>([new Segment("foo", 5), new Segment("bar", 6)], () => true);
-            assert.equal(path.get("foo")!.value, 5);
-            assert.equal(path.get("bar")!.value, 6);
+            const path = new Path([new Segment("foo", 5), new Segment("bar", 6)], () => true);
+            assert.equal(path.get("foo").value, 5);
+            assert.equal(path.get("bar").value, 6);
        },
        "path.replace success": assert => {
-            const path = new Path<SegmentType>([new Segment("foo", 5), new Segment("bar", 6)], () => true);
+            const path = new Path([new Segment("foo", 5), new Segment("bar", 6)], () => true);
            const newPath = path.replace(new Segment("foo", 1));
-            assert.equal(newPath!.get("foo")!.value, 1);
-            assert.equal(newPath!.get("bar")!.value, 6);
+            assert.equal(newPath.get("foo").value, 1);
+            assert.equal(newPath.get("bar").value, 6);
        },
        "path.replace not found": assert => {
-            const path = new Path<SegmentType>([new Segment("foo", 5), new Segment("bar", 6)], () => true);
+            const path = new Path([new Segment("foo", 5), new Segment("bar", 6)], () => true);
            const newPath = path.replace(new Segment("baz", 1));
            assert.equal(newPath, null);
        }
--- a/src/domain/navigation/URLRouter.js
+++ b/src/domain/navigation/URLRouter.js
@ -14,55 +14,28 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */

-import type {History} from "../../platform/web/dom/History.js";
-import type {Navigation, Segment, Path, OptionalValue} from "./Navigation";
-import type {SubscriptionHandle} from "../../observable/BaseObservable";
-
-type ParseURLPath<T> = (urlPath: string, currentNavPath: Path<T>, defaultSessionId?: string) => Segment<T>[];
-type StringifyPath<T> = (path: Path<T>) => string;
-
-export interface IURLRouter<T> {
-    attach(): void;
-    dispose(): void;
-    pushUrl(url: string): void;
-    tryRestoreLastUrl(): boolean;
-    urlForSegments(segments: Segment<T>[]): string | undefined;
-    urlForSegment<K extends keyof T>(type: K, ...value: OptionalValue<T[K]>): string | undefined;
-    urlUntilSegment(type: keyof T): string;
-    urlForPath(path: Path<T>): string;
-    openRoomActionUrl(roomId: string): string;
-    createSSOCallbackURL(): string;
-    normalizeUrl(): void;
-}
-
-export class URLRouter<T extends {session: string | boolean}> implements IURLRouter<T> {
-    private readonly _history: History;
-    private readonly _navigation: Navigation<T>;
-    private readonly _parseUrlPath: ParseURLPath<T>;
-    private readonly _stringifyPath: StringifyPath<T>;
-    private _subscription?: SubscriptionHandle;
-    private _pathSubscription?: SubscriptionHandle;
-    private _isApplyingUrl: boolean = false;
-    private _defaultSessionId?: string;
-
-    constructor(history: History, navigation: Navigation<T>, parseUrlPath: ParseURLPath<T>, stringifyPath: StringifyPath<T>) {
+export class URLRouter {
+    constructor({history, navigation, parseUrlPath, stringifyPath}) {
        this._history = history;
        this._navigation = navigation;
        this._parseUrlPath = parseUrlPath;
        this._stringifyPath = stringifyPath;
+        this._subscription = null;
+        this._pathSubscription = null;
+        this._isApplyingUrl = false;
        this._defaultSessionId = this._getLastSessionId();
    }

-    private _getLastSessionId(): string | undefined {
-        const navPath = this._urlAsNavPath(this._history.getLastSessionUrl() || "");
+    _getLastSessionId() {
+        const navPath = this._urlAsNavPath(this._history.getLastUrl() || "");
        const sessionId = navPath.get("session")?.value;
        if (typeof sessionId === "string") {
            return sessionId;
        }
-        return undefined;
+        return null;
    }

-    attach(): void {
+    attach() {
        this._subscription = this._history.subscribe(url => this._applyUrl(url));
        // subscribe to path before applying initial url
        // so redirects in _applyNavPathToHistory are reflected in url bar
@ -70,12 +43,12 @@ export class URLRouter<T extends {session: string | boolean}> implements IURLRou
        this._applyUrl(this._history.get());
    }

-    dispose(): void {
-        if (this._subscription) { this._subscription = this._subscription(); }
-        if (this._pathSubscription) { this._pathSubscription = this._pathSubscription(); }
+    dispose() {
+        this._subscription = this._subscription();
+        this._pathSubscription = this._pathSubscription();
    }

-    private _applyNavPathToHistory(path: Path<T>): void {
+    _applyNavPathToHistory(path) {
        const url = this.urlForPath(path);
        if (url !== this._history.get()) {
            if (this._isApplyingUrl) {
@ -87,7 +60,7 @@ export class URLRouter<T extends {session: string | boolean}> implements IURLRou
        }
    }

-    private _applyNavPathToNavigation(navPath: Path<T>): void {
+    _applyNavPathToNavigation(navPath) {
        // this will cause _applyNavPathToHistory to be called,
        // so set a flag whether this request came from ourselves
        // (in which case it is a redirect if the url does not match the current one)
@ -96,22 +69,22 @@ export class URLRouter<T extends {session: string | boolean}> implements IURLRou
        this._isApplyingUrl = false;
    }

-    private _urlAsNavPath(url: string): Path<T> {
+    _urlAsNavPath(url) {
        const urlPath = this._history.urlAsPath(url);
        return this._navigation.pathFrom(this._parseUrlPath(urlPath, this._navigation.path, this._defaultSessionId));
    }

-    private _applyUrl(url: string): void {
+    _applyUrl(url) {
        const navPath = this._urlAsNavPath(url);
        this._applyNavPathToNavigation(navPath);
    }

-    pushUrl(url: string): void {
+    pushUrl(url) {
        this._history.pushUrl(url);
    }

-    tryRestoreLastUrl(): boolean {
-        const lastNavPath = this._urlAsNavPath(this._history.getLastSessionUrl() || "");
+    tryRestoreLastUrl() {
+        const lastNavPath = this._urlAsNavPath(this._history.getLastUrl() || "");
        if (lastNavPath.segments.length !== 0) {
            this._applyNavPathToNavigation(lastNavPath);
            return true;
@ -119,8 +92,8 @@ export class URLRouter<T extends {session: string | boolean}> implements IURLRou
        return false;
    }

-    urlForSegments(segments: Segment<T>[]): string | undefined {
-        let path: Path<T> | undefined = this._navigation.path;
+    urlForSegments(segments) {
+        let path = this._navigation.path;
        for (const segment of segments) {
            path = path.with(segment);
            if (!path) {
@ -130,29 +103,29 @@ export class URLRouter<T extends {session: string | boolean}> implements IURLRou
        return this.urlForPath(path);
    }

-    urlForSegment<K extends keyof T>(type: K, ...value: OptionalValue<T[K]>): string | undefined {
-        return this.urlForSegments([this._navigation.segment(type, ...value)]);
+    urlForSegment(type, value) {
+        return this.urlForSegments([this._navigation.segment(type, value)]);
    }

-    urlUntilSegment(type: keyof T): string {
+    urlUntilSegment(type) {
        return this.urlForPath(this._navigation.path.until(type));
    }

-    urlForPath(path: Path<T>): string {
+    urlForPath(path) {
        return this._history.pathAsUrl(this._stringifyPath(path));
    }

-    openRoomActionUrl(roomId: string): string {
+    openRoomActionUrl(roomId) {
        // not a segment to navigation knowns about, so append it manually
        const urlPath = `${this._stringifyPath(this._navigation.path.until("session"))}/open-room/${roomId}`;
        return this._history.pathAsUrl(urlPath);
    }

-    createSSOCallbackURL(): string {
+    createSSOCallbackURL() {
        return window.location.origin;
    }

-    normalizeUrl(): void {
+    normalizeUrl() {
        // Remove any queryParameters from the URL
        // Gets rid of the loginToken after SSO
        this._history.replaceUrlSilently(`${window.location.origin}/${window.location.hash}`);
--- a/src/domain/navigation/index.js
+++ b/src/domain/navigation/index.js
@ -14,36 +14,18 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */

-import {Navigation, Segment} from "./Navigation";
-import {URLRouter} from "./URLRouter";
-import type {Path, OptionalValue} from "./Navigation";
+import {Navigation, Segment} from "./Navigation.js";
+import {URLRouter} from "./URLRouter.js";

-export type SegmentType = {
-    "login": true;
-    "session": string | boolean;
-    "sso": string;
-    "logout": true;
-    "room": string;
-    "rooms": string[];
-    "settings": true;
-    "create-room": true;
-    "empty-grid-tile": number;
-    "lightbox": string;
-    "right-panel": true;
-    "details": true;
-    "members": true;
-    "member": string;
-};
-
-export function createNavigation(): Navigation<SegmentType> {
+export function createNavigation() {
    return new Navigation(allowsChild);
 }

-export function createRouter({history, navigation}: {history: History, navigation: Navigation<SegmentType>}): URLRouter<SegmentType> {
-    return new URLRouter(history, navigation, parseUrlPath, stringifyPath);
+export function createRouter({history, navigation}) {
+    return new URLRouter({history, navigation, stringifyPath, parseUrlPath});
 }

-function allowsChild(parent: Segment<SegmentType> | undefined, child: Segment<SegmentType>): boolean {
+function allowsChild(parent, child) {
    const {type} = child;
    switch (parent?.type) {
        case undefined:
@ -63,9 +45,8 @@ function allowsChild(parent: Segment<SegmentType> | undefined, child: Segment<Se
    }
 }

-export function removeRoomFromPath(path: Path<SegmentType>, roomId: string): Path<SegmentType> | undefined {
-    let newPath: Path<SegmentType> | undefined = path;
-    const rooms = newPath.get("rooms");
+export function removeRoomFromPath(path, roomId) {
+    const rooms = path.get("rooms");
    let roomIdGridIndex = -1;
    // first delete from rooms segment
    if (rooms) {
@ -73,22 +54,22 @@ export function removeRoomFromPath(path: Path<SegmentType>, roomId: string): Pat
        if (roomIdGridIndex !== -1) {
            const idsWithoutRoom = rooms.value.slice();
            idsWithoutRoom[roomIdGridIndex] = "";
-            newPath = newPath.replace(new Segment("rooms", idsWithoutRoom));
+            path = path.replace(new Segment("rooms", idsWithoutRoom));
        }
    }
-    const room = newPath!.get("room");
+    const room = path.get("room");
    // then from room (which occurs with or without rooms)
    if (room && room.value === roomId) {
        if (roomIdGridIndex !== -1) {
-            newPath = newPath!.with(new Segment("empty-grid-tile", roomIdGridIndex));
+            path = path.with(new Segment("empty-grid-tile", roomIdGridIndex));
        } else {
-            newPath = newPath!.until("session");
+            path = path.until("session");
        }
    }
-    return newPath;
+    return path;
 }

-function roomsSegmentWithRoom(rooms: Segment<SegmentType, "rooms">, roomId: string, path: Path<SegmentType>): Segment<SegmentType, "rooms"> {
+function roomsSegmentWithRoom(rooms, roomId, path) {
    if(!rooms.value.includes(roomId)) {
        const emptyGridTile = path.get("empty-grid-tile");
        const oldRoom = path.get("room");
@ -106,28 +87,28 @@ function roomsSegmentWithRoom(rooms: Segment<SegmentType, "rooms">, roomId: stri
    }
 }

-function pushRightPanelSegment<T extends keyof SegmentType>(array: Segment<SegmentType>[], segment: T, ...value: OptionalValue<SegmentType[T]>): void {
+function pushRightPanelSegment(array, segment, value = true) {
    array.push(new Segment("right-panel"));
-    array.push(new Segment(segment, ...value));
+    array.push(new Segment(segment, value));
 }

-export function addPanelIfNeeded<T extends SegmentType>(navigation: Navigation<T>, path: Path<T>): Path<T> {
+export function addPanelIfNeeded(navigation, path) {
    const segments = navigation.path.segments;
    const i = segments.findIndex(segment => segment.type === "right-panel");
    let _path = path;
    if (i !== -1) {
        _path = path.until("room");
-        _path = _path.with(segments[i])!;
-        _path = _path.with(segments[i + 1])!;
+        _path = _path.with(segments[i]);
+        _path = _path.with(segments[i + 1]);
    }
    return _path;
 }

-export function parseUrlPath(urlPath: string, currentNavPath: Path<SegmentType>, defaultSessionId?: string): Segment<SegmentType>[] {
-    // substring(1) to take of initial /
-    const parts = urlPath.substring(1).split("/");
+export function parseUrlPath(urlPath, currentNavPath, defaultSessionId) {
+    // substr(1) to take of initial /
+    const parts = urlPath.substr(1).split("/");
    const iterator = parts[Symbol.iterator]();
-    const segments: Segment<SegmentType>[] = [];
+    const segments = [];
    let next; 
    while (!(next = iterator.next()).done) {
        const type = next.value;
@ -189,9 +170,9 @@ export function parseUrlPath(urlPath: string, currentNavPath: Path<SegmentType>,
    return segments;
 }

-export function stringifyPath(path: Path<SegmentType>): string {
+export function stringifyPath(path) {
    let urlPath = "";
-    let prevSegment: Segment<SegmentType> | undefined;
+    let prevSegment;
    for (const segment of path.segments) {
        switch (segment.type) {
            case "rooms":
@ -224,15 +205,9 @@ export function stringifyPath(path: Path<SegmentType>): string {
 }

 export function tests() {
-    function createEmptyPath() {
-        const nav: Navigation<SegmentType> = new Navigation(allowsChild);
-        const path = nav.pathFrom([]);
-        return path;
-    }
-
    return {
        "stringify grid url with focused empty tile": assert => {
-            const nav: Navigation<SegmentType> = new Navigation(allowsChild);
+            const nav = new Navigation(allowsChild);
            const path = nav.pathFrom([
                new Segment("session", 1),
                new Segment("rooms", ["a", "b", "c"]),
@ -242,7 +217,7 @@ export function tests() {
            assert.equal(urlPath, "/session/1/rooms/a,b,c/3");
        },
        "stringify grid url with focused room": assert => {
-            const nav: Navigation<SegmentType> = new Navigation(allowsChild);
+            const nav = new Navigation(allowsChild);
            const path = nav.pathFrom([
                new Segment("session", 1),
                new Segment("rooms", ["a", "b", "c"]),
@ -252,7 +227,7 @@ export function tests() {
            assert.equal(urlPath, "/session/1/rooms/a,b,c/1");
        },
        "stringify url with right-panel and details segment": assert => {
-            const nav: Navigation<SegmentType> = new Navigation(allowsChild);
+            const nav = new Navigation(allowsChild);
            const path = nav.pathFrom([
                new Segment("session", 1),
                new Segment("rooms", ["a", "b", "c"]),
@ -264,15 +239,13 @@ export function tests() {
            assert.equal(urlPath, "/session/1/rooms/a,b,c/1/details");
        },
        "Parse loginToken query parameter into SSO segment": assert => {
-            const path = createEmptyPath();
-            const segments = parseUrlPath("?loginToken=a1232aSD123", path);
+            const segments = parseUrlPath("?loginToken=a1232aSD123");
            assert.equal(segments.length, 1);
            assert.equal(segments[0].type, "sso");
            assert.equal(segments[0].value, "a1232aSD123");
        },
        "parse grid url path with focused empty tile": assert => {
-            const path = createEmptyPath();
-            const segments = parseUrlPath("/session/1/rooms/a,b,c/3", path);
+            const segments = parseUrlPath("/session/1/rooms/a,b,c/3");
            assert.equal(segments.length, 3);
            assert.equal(segments[0].type, "session");
            assert.equal(segments[0].value, "1");
@ -282,8 +255,7 @@ export function tests() {
            assert.equal(segments[2].value, 3);
        },
        "parse grid url path with focused room": assert => {
-            const path = createEmptyPath();
-            const segments = parseUrlPath("/session/1/rooms/a,b,c/1", path);
+            const segments = parseUrlPath("/session/1/rooms/a,b,c/1");
            assert.equal(segments.length, 3);
            assert.equal(segments[0].type, "session");
            assert.equal(segments[0].value, "1");
@ -293,8 +265,7 @@ export function tests() {
            assert.equal(segments[2].value, "b");
        },
        "parse empty grid url": assert => {
-            const path = createEmptyPath();
-            const segments = parseUrlPath("/session/1/rooms/", path);
+            const segments = parseUrlPath("/session/1/rooms/");
            assert.equal(segments.length, 3);
            assert.equal(segments[0].type, "session");
            assert.equal(segments[0].value, "1");
@ -304,8 +275,7 @@ export function tests() {
            assert.equal(segments[2].value, 0);
        },
        "parse empty grid url with focus": assert => {
-            const path = createEmptyPath();
-            const segments = parseUrlPath("/session/1/rooms//1", path);
+            const segments = parseUrlPath("/session/1/rooms//1");
            assert.equal(segments.length, 3);
            assert.equal(segments[0].type, "session");
            assert.equal(segments[0].value, "1");
@ -315,7 +285,7 @@ export function tests() {
            assert.equal(segments[2].value, 1);
        },
        "parse open-room action replacing the current focused room": assert => {
-            const nav: Navigation<SegmentType> = new Navigation(allowsChild);
+            const nav = new Navigation(allowsChild);
            const path = nav.pathFrom([
                new Segment("session", 1),
                new Segment("rooms", ["a", "b", "c"]),
@ -331,7 +301,7 @@ export function tests() {
            assert.equal(segments[2].value, "d");
        },
        "parse open-room action changing focus to an existing room": assert => {
-            const nav: Navigation<SegmentType> = new Navigation(allowsChild);
+            const nav = new Navigation(allowsChild);
            const path = nav.pathFrom([
                new Segment("session", 1),
                new Segment("rooms", ["a", "b", "c"]),
@ -347,7 +317,7 @@ export function tests() {
            assert.equal(segments[2].value, "a");
        },
        "parse open-room action changing focus to an existing room with details open": assert => {
-            const nav: Navigation<SegmentType> = new Navigation(allowsChild);
+            const nav = new Navigation(allowsChild);
            const path = nav.pathFrom([
                new Segment("session", 1),
                new Segment("rooms", ["a", "b", "c"]),
@ -369,7 +339,7 @@ export function tests() {
            assert.equal(segments[4].value, true);
        },
        "open-room action should only copy over previous segments if there are no parts after open-room": assert => {
-            const nav: Navigation<SegmentType> = new Navigation(allowsChild);
+            const nav = new Navigation(allowsChild);
            const path = nav.pathFrom([
                new Segment("session", 1),
                new Segment("rooms", ["a", "b", "c"]),
@ -391,7 +361,7 @@ export function tests() {
            assert.equal(segments[4].value, "foo");
        },
        "parse open-room action setting a room in an empty tile": assert => {
-            const nav: Navigation<SegmentType> = new Navigation(allowsChild);
+            const nav = new Navigation(allowsChild);
            const path = nav.pathFrom([
                new Segment("session", 1),
                new Segment("rooms", ["a", "b", "c"]),
@ -407,83 +377,82 @@ export function tests() {
            assert.equal(segments[2].value, "d");
        },
        "parse session url path without id": assert => {
-            const path = createEmptyPath();
-            const segments = parseUrlPath("/session", path);
+            const segments = parseUrlPath("/session");
            assert.equal(segments.length, 1);
            assert.equal(segments[0].type, "session");
            assert.strictEqual(segments[0].value, true);
        },
        "remove active room from grid path turns it into empty tile": assert => {
-            const nav: Navigation<SegmentType> = new Navigation(allowsChild);
+            const nav = new Navigation(allowsChild);
            const path = nav.pathFrom([
                new Segment("session", 1),
                new Segment("rooms", ["a", "b", "c"]),
                new Segment("room", "b")
            ]);
            const newPath = removeRoomFromPath(path, "b");
-            assert.equal(newPath?.segments.length, 3);
-            assert.equal(newPath?.segments[0].type, "session");
-            assert.equal(newPath?.segments[0].value, 1);
-            assert.equal(newPath?.segments[1].type, "rooms");
-            assert.deepEqual(newPath?.segments[1].value, ["a", "", "c"]);
-            assert.equal(newPath?.segments[2].type, "empty-grid-tile");
-            assert.equal(newPath?.segments[2].value, 1);
+            assert.equal(newPath.segments.length, 3);
+            assert.equal(newPath.segments[0].type, "session");
+            assert.equal(newPath.segments[0].value, 1);
+            assert.equal(newPath.segments[1].type, "rooms");
+            assert.deepEqual(newPath.segments[1].value, ["a", "", "c"]);
+            assert.equal(newPath.segments[2].type, "empty-grid-tile");
+            assert.equal(newPath.segments[2].value, 1);
        },
        "remove inactive room from grid path": assert => {
-            const nav: Navigation<SegmentType> = new Navigation(allowsChild);
+            const nav = new Navigation(allowsChild);
            const path = nav.pathFrom([
                new Segment("session", 1),
                new Segment("rooms", ["a", "b", "c"]),
                new Segment("room", "b")
            ]);
            const newPath = removeRoomFromPath(path, "a");
-            assert.equal(newPath?.segments.length, 3);
-            assert.equal(newPath?.segments[0].type, "session");
-            assert.equal(newPath?.segments[0].value, 1);
-            assert.equal(newPath?.segments[1].type, "rooms");
-            assert.deepEqual(newPath?.segments[1].value, ["", "b", "c"]);
-            assert.equal(newPath?.segments[2].type, "room");
-            assert.equal(newPath?.segments[2].value, "b");
+            assert.equal(newPath.segments.length, 3);
+            assert.equal(newPath.segments[0].type, "session");
+            assert.equal(newPath.segments[0].value, 1);
+            assert.equal(newPath.segments[1].type, "rooms");
+            assert.deepEqual(newPath.segments[1].value, ["", "b", "c"]);
+            assert.equal(newPath.segments[2].type, "room");
+            assert.equal(newPath.segments[2].value, "b");
        },
        "remove inactive room from grid path with empty tile": assert => {
-            const nav: Navigation<SegmentType> = new Navigation(allowsChild);
+            const nav = new Navigation(allowsChild);
            const path = nav.pathFrom([
                new Segment("session", 1),
                new Segment("rooms", ["a", "b", ""]),
                new Segment("empty-grid-tile", 3)
            ]);
            const newPath = removeRoomFromPath(path, "b");
-            assert.equal(newPath?.segments.length, 3);
-            assert.equal(newPath?.segments[0].type, "session");
-            assert.equal(newPath?.segments[0].value, 1);
-            assert.equal(newPath?.segments[1].type, "rooms");
-            assert.deepEqual(newPath?.segments[1].value, ["a", "", ""]);
-            assert.equal(newPath?.segments[2].type, "empty-grid-tile");
-            assert.equal(newPath?.segments[2].value, 3);
+            assert.equal(newPath.segments.length, 3);
+            assert.equal(newPath.segments[0].type, "session");
+            assert.equal(newPath.segments[0].value, 1);
+            assert.equal(newPath.segments[1].type, "rooms");
+            assert.deepEqual(newPath.segments[1].value, ["a", "", ""]);
+            assert.equal(newPath.segments[2].type, "empty-grid-tile");
+            assert.equal(newPath.segments[2].value, 3);
        },
        "remove active room": assert => {
-            const nav: Navigation<SegmentType> = new Navigation(allowsChild);
+            const nav = new Navigation(allowsChild);
            const path = nav.pathFrom([
                new Segment("session", 1),
                new Segment("room", "b")
            ]);
            const newPath = removeRoomFromPath(path, "b");
-            assert.equal(newPath?.segments.length, 1);
-            assert.equal(newPath?.segments[0].type, "session");
-            assert.equal(newPath?.segments[0].value, 1);
+            assert.equal(newPath.segments.length, 1);
+            assert.equal(newPath.segments[0].type, "session");
+            assert.equal(newPath.segments[0].value, 1);
        },
        "remove inactive room doesn't do anything": assert => {
-            const nav: Navigation<SegmentType> = new Navigation(allowsChild);
+            const nav = new Navigation(allowsChild);
            const path = nav.pathFrom([
                new Segment("session", 1),
                new Segment("room", "b")
            ]);
            const newPath = removeRoomFromPath(path, "a");
-            assert.equal(newPath?.segments.length, 2);
-            assert.equal(newPath?.segments[0].type, "session");
-            assert.equal(newPath?.segments[0].value, 1);
-            assert.equal(newPath?.segments[1].type, "room");
-            assert.equal(newPath?.segments[1].value, "b");
+            assert.equal(newPath.segments.length, 2);
+            assert.equal(newPath.segments[0].type, "session");
+            assert.equal(newPath.segments[0].value, 1);
+            assert.equal(newPath.segments[1].type, "room");
+            assert.equal(newPath.segments[1].value, "b");
        },
        
    }
--- a/src/domain/session/RoomGridViewModel.js
+++ b/src/domain/session/RoomGridViewModel.js
@ -15,7 +15,7 @@ limitations under the License.
 */

 import {ViewModel} from "../ViewModel";
-import {addPanelIfNeeded} from "../navigation/index";
+import {addPanelIfNeeded} from "../navigation/index.js";

 function dedupeSparse(roomIds) {
    return roomIds.map((id, idx) => {
@ -185,7 +185,7 @@ export class RoomGridViewModel extends ViewModel {
    }
 }

-import {createNavigation} from "../navigation/index";
+import {createNavigation} from "../navigation/index.js";
 import {ObservableValue} from "../../observable/ObservableValue";

 export function tests() { 
--- a/src/domain/session/leftpanel/LeftPanelViewModel.js
+++ b/src/domain/session/leftpanel/LeftPanelViewModel.js
@ -21,7 +21,7 @@ import {InviteTileViewModel} from "./InviteTileViewModel.js";
 import {RoomBeingCreatedTileViewModel} from "./RoomBeingCreatedTileViewModel.js";
 import {RoomFilter} from "./RoomFilter.js";
 import {ApplyMap} from "../../../observable/map/ApplyMap.js";
-import {addPanelIfNeeded} from "../../navigation/index";
+import {addPanelIfNeeded} from "../../navigation/index.js";

 export class LeftPanelViewModel extends ViewModel {
    constructor(options) {
--- a/src/domain/session/room/RoomViewModel.js
+++ b/src/domain/session/room/RoomViewModel.js
@ -23,7 +23,6 @@ import {imageToInfo} from "../common.js";
 // TODO: remove fallback so default isn't included in bundle for SDK users that have their custom tileClassForEntry
 // this is a breaking SDK change though to make this option mandatory
 import {tileClassForEntry as defaultTileClassForEntry} from "./timeline/tiles/index";
-import {RoomStatus} from "../../../matrix/room/common";

 export class RoomViewModel extends ViewModel {
    constructor(options) {
@ -198,90 +197,19 @@ export class RoomViewModel extends ViewModel {
        }
    }
    
-    async _processCommandJoin(roomName) {
-        try {
-            const roomId = await this._options.client.session.joinRoom(roomName);
-            const roomStatusObserver = await this._options.client.session.observeRoomStatus(roomId);
-            await roomStatusObserver.waitFor(status => status === RoomStatus.Joined);
-            this.navigation.push("room", roomId);
-        } catch (err) {
-            let exc;
-            if ((err.statusCode ?? err.status) === 400) {
-                exc = new Error(`/join : '${roomName}' was not legal room ID or room alias`);
-            } else if ((err.statusCode ?? err.status) === 404 || (err.statusCode ?? err.status) === 502 || err.message == "Internal Server Error") {
-                exc = new Error(`/join : room '${roomName}' not found`);
-            } else if ((err.statusCode ?? err.status) === 403) {
-                exc = new Error(`/join : you're not invited to join '${roomName}'`);
-            } else {
-                exc = err;
-            }
-            this._sendError = exc;
-            this._timelineError = null;
-            this.emitChange("error");
-        }
-    } 
-
-    async _processCommand (message) {
-        let msgtype;
-        const [commandName, ...args] = message.substring(1).split(" ");
-        switch (commandName) {
-            case "me":
-                message = args.join(" ");
-                msgtype = "m.emote";
-                break;
-            case "join":
-                if (args.length === 1) {
-                    const roomName = args[0];
-                    await this._processCommandJoin(roomName);
-                } else {
-                    this._sendError = new Error("join syntax: /join <room-id>");
-                    this._timelineError = null;
-                    this.emitChange("error");
-                }
-                break;
-            case "shrug":
-                message = "¯\\_(ツ)_/¯ " + args.join(" ");
-                msgtype = "m.text";
-                break;
-            case "tableflip":
-                message = "(╯°□°）╯︵ ┻━┻ " + args.join(" ");
-                msgtype = "m.text";
-                break;
-            case "unflip":
-                message = "┬──┬ ノ( ゜-゜ノ) " + args.join(" ");
-                msgtype = "m.text";
-                break;
-            case "lenny":
-                message = "( ͡° ͜ʖ ͡°) " + args.join(" ");
-                msgtype = "m.text";
-                break;
-            default:
-                this._sendError = new Error(`no command name "${commandName}". To send the message instead of executing, please type "/${message}"`);
-                this._timelineError = null;
-                this.emitChange("error");
-                message = undefined;
-       }
-       return {type: msgtype, message: message};
-   }
-    
    async _sendMessage(message, replyingTo) {
        if (!this._room.isArchived && message) {
-            let messinfo = {type : "m.text", message : message};
-            if (message.startsWith("//")) {
-                messinfo.message = message.substring(1).trim();
-            } else if (message.startsWith("/")) {
-                messinfo = await this._processCommand(message);
-            }
            try {
-                const msgtype = messinfo.type;
-                const message = messinfo.message;
-                if (msgtype && message) {
+                let msgtype = "m.text";
+                if (message.startsWith("/me ")) {
+                    message = message.substr(4).trim();
+                    msgtype = "m.emote";
+                }
                if (replyingTo) {
                    await replyingTo.reply(msgtype, message);
                } else {
                    await this._room.sendEvent("m.room.message", {msgtype, body: message});
                }
-                }
            } catch (err) {
                console.error(`room.sendMessage(): ${err.message}:\n${err.stack}`);
                this._sendError = err;
@ -425,11 +353,6 @@ export class RoomViewModel extends ViewModel {
            this._composerVM.setReplyingTo(entry);
        }
    }
-    
-    dismissError() {
-        this._sendError = null;
-        this.emitChange("error");
-    }
 }

 function videoToInfo(video) {
--- a/src/lib.ts
+++ b/src/lib.ts
@ -18,7 +18,7 @@ export {Platform} from "./platform/web/Platform.js";
 export {Client, LoadStatus} from "./matrix/Client.js";
 export {RoomStatus} from "./matrix/room/common";
 // export main view & view models
-export {createNavigation, createRouter} from "./domain/navigation/index";
+export {createNavigation, createRouter} from "./domain/navigation/index.js";
 export {RootViewModel} from "./domain/RootViewModel.js";
 export {RootView} from "./platform/web/ui/RootView.js";
 export {SessionViewModel} from "./domain/session/SessionViewModel.js";
--- a/src/matrix/Client.js
+++ b/src/matrix/Client.js
@ -100,8 +100,6 @@ export class Client {
        });
    }

-    // TODO: When converted to typescript this should return the same type
-    // as this._loginOptions is in LoginViewModel.ts (LoginOptions).
    _parseLoginOptions(options, homeserver) {
        /*
        Take server response and return new object which has two props password and sso which
--- a/src/matrix/login/index.ts
+++ b/src/matrix/login/index.ts
@ -1,7 +0,0 @@
-import {ILoginMethod} from "./LoginMethod";
-import {PasswordLoginMethod} from "./PasswordLoginMethod";
-import {SSOLoginHelper} from "./SSOLoginHelper";
-import {TokenLoginMethod} from "./TokenLoginMethod";
-
-
-export {PasswordLoginMethod, SSOLoginHelper, TokenLoginMethod, ILoginMethod};
--- a/src/matrix/storage/idb/StorageFactory.ts
+++ b/src/matrix/storage/idb/StorageFactory.ts
@ -42,7 +42,6 @@ async function requestPersistedStorage(): Promise<boolean> {
            await glob.document.requestStorageAccess();
            return true;
        } catch (err) {
-            console.warn("requestStorageAccess threw an error:", err);
            return false;
        }
    } else {
--- a/src/platform/types/config.ts
+++ b/src/platform/types/config.ts
@ -1,64 +0,0 @@
-/*
-Copyright 2022 The Matrix.org Foundation C.I.C.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/
-
-export type Config = {
-    /**
-     * The default homeserver used by Hydrogen; auto filled in the login UI.
-     * eg: https://matrix.org
-     * REQUIRED
-     */
-    defaultHomeServer: string;
-    /**
-     * The submit endpoint for your preferred rageshake server.
-     * eg: https://element.io/bugreports/submit
-     * Read more about rageshake at https://github.com/matrix-org/rageshake
-     * OPTIONAL
-     */
-    bugReportEndpointUrl?: string;
-    /**
-     * Paths to theme-manifests
-     * eg: ["assets/theme-element.json", "assets/theme-awesome.json"]
-     * REQUIRED
-     */
-    themeManifests: string[];
-    /**
-     * This configures the default theme(s) used by Hydrogen.
-     * These themes appear as "Default" option in the theme chooser UI and are also
-     * used as a fallback when other themes fail to load.
-     * Whether the dark or light variant is used depends on the system preference.
-     * OPTIONAL
-     */
-    defaultTheme?: {
-        // id of light theme
-        light: string;
-        // id of dark theme
-        dark: string;
-    };
-    /**
-     * Configuration for push notifications.
-     * See https://spec.matrix.org/latest/client-server-api/#post_matrixclientv3pushersset
-     * and https://github.com/matrix-org/sygnal/blob/main/docs/applications.md#webpush
-     * OPTIONAL
-     */
-    push?: {
-        // See app_id in the request body in above link
-        appId: string;
-        // The host used for pushing notification
-        gatewayUrl: string;
-        // See pushkey in above link
-        applicationServerKey: string;
-    };
-};
--- a/src/platform/types/theme.ts
+++ b/src/platform/types/theme.ts
@ -22,13 +22,6 @@ export type ThemeManifest = Partial<{
    version: number;
    // A user-facing string that is the name for this theme-collection.
    name: string;
-    // An identifier for this theme
-    id: string;
-    /**
-     * Id of the theme that this theme derives from.
-     * Only present for derived/runtime themes.
-    */
-    extends: string;
    /**
     * This is added to the manifest during the build process and includes data
     * that is needed to load themes at runtime.
@ -49,12 +42,6 @@ export type ThemeManifest = Partial<{
        "runtime-asset": string;
        // Array of derived-variables
        "derived-variables": Array<string>;
-        /**
-         * Mapping from icon variable to location of icon in build output with query parameters
-         * indicating how it should be colored for this particular theme.
-         * eg: "icon-url-1": "element-logo.86bc8565.svg?primary=accent-color"
-         */
-        icon: Record<string, string>;
    };
    values: {
        /**
@ -73,8 +60,6 @@ type Variant = Partial<{
    default: boolean;
    // A user-facing string that is the name for this variant.
    name: string;
-    // A boolean indicating whether this is a dark theme or not
-    dark: boolean;
    /**
     * Mapping from css variable to its value.
     * eg: {"background-color-primary": "#21262b", ...} 
--- a/src/platform/web/Platform.js
+++ b/src/platform/web/Platform.js
@ -38,7 +38,7 @@ import {downloadInIframe} from "./dom/download.js";
 import {Disposables} from "../../utils/Disposables";
 import {parseHTML} from "./parsehtml.js";
 import {handleAvatarError} from "./ui/avatar";
-import {ThemeLoader} from "./theming/ThemeLoader";
+import {ThemeLoader} from "./ThemeLoader";

 function addScript(src) {
    return new Promise(function (resolve, reject) {
--- a/src/platform/web/ThemeLoader.ts
+++ b/src/platform/web/ThemeLoader.ts
@ -0,0 +1,217 @@
+/*
+Copyright 2020 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import type {ILogItem} from "../../logging/types.js";
+import type {Platform} from "./Platform.js";
+
+type NormalVariant = {
+    id: string;
+    cssLocation: string;
+};
+
+type DefaultVariant = {
+    dark: {
+        id: string;
+        cssLocation: string;
+        variantName: string;
+    };
+    light: {
+        id: string;
+        cssLocation: string;
+        variantName: string;
+    };
+    default: {
+        id: string;
+        cssLocation: string;
+        variantName: string;
+    };
+}
+
+type ThemeInformation = NormalVariant | DefaultVariant; 
+
+export enum ColorSchemePreference {
+    Dark,
+    Light
+};
+
+export class ThemeLoader {
+    private _platform: Platform;
+    private _themeMapping: Record<string, ThemeInformation>;
+
+    constructor(platform: Platform) {
+        this._platform = platform;
+    }
+
+    async init(manifestLocations: string[], log?: ILogItem): Promise<void> {
+        await this._platform.logger.wrapOrRun(log, "ThemeLoader.init", async (log) => {
+            this._themeMapping = {};
+            const results = await Promise.all(
+                manifestLocations.map( location => this._platform.request(location, { method: "GET", format: "json", cache: true, }).response())
+            );
+            results.forEach(({ body }, i) => this._populateThemeMap(body, manifestLocations[i], log));
+        });
+    }
+
+    private _populateThemeMap(manifest, manifestLocation: string, log: ILogItem) {
+        log.wrap("populateThemeMap", (l) => {
+            /*
+            After build has finished, the source section of each theme manifest
+            contains `built-assets` which is a mapping from the theme-id to
+            cssLocation of theme
+            */
+            const builtAssets: Record<string, string> = manifest.source?.["built-assets"];
+            const themeName = manifest.name;
+            let defaultDarkVariant: any = {}, defaultLightVariant: any = {};
+            for (let [themeId, cssLocation] of Object.entries(builtAssets)) {
+                try {
+                    /**
+                     * This cssLocation is relative to the location of the manifest file.
+                     * So we first need to resolve it relative to the root of this hydrogen instance.
+                     */
+                    cssLocation = new URL(cssLocation, new URL(manifestLocation, window.location.origin)).href;
+                }
+                catch {
+                    continue;
+                }
+                const variant = themeId.match(/.+-(.+)/)?.[1];
+                const { name: variantName, default: isDefault, dark } = manifest.values.variants[variant!];
+                const themeDisplayName = `${themeName} ${variantName}`;
+                if (isDefault) {
+                    /**
+                     * This is a default variant!
+                     * We'll add these to the themeMapping (separately) keyed with just the
+                     * theme-name (i.e "Element" instead of "Element Dark").
+                     * We need to be able to distinguish them from other variants!
+                     * 
+                     * This allows us to render radio-buttons with "dark" and
+                     * "light" options.
+                    */
+                    const defaultVariant = dark ? defaultDarkVariant : defaultLightVariant;
+                    defaultVariant.variantName = variantName;
+                    defaultVariant.id = themeId
+                    defaultVariant.cssLocation = cssLocation;
+                    continue;
+                }
+                // Non-default variants are keyed in themeMapping with "theme_name variant_name"
+                // eg: "Element Dark"
+                this._themeMapping[themeDisplayName] = {
+                    cssLocation,
+                    id: themeId
+                };
+            }
+            if (defaultDarkVariant.id && defaultLightVariant.id) {
+                /**
+                 * As mentioned above, if there's both a default dark and a default light variant,
+                 * add them to themeMapping separately.
+                 */
+                const defaultVariant = this.preferredColorScheme === ColorSchemePreference.Dark ? defaultDarkVariant : defaultLightVariant;
+                this._themeMapping[themeName] = { dark: defaultDarkVariant, light: defaultLightVariant, default: defaultVariant };
+            }
+            else {
+                /**
+                 * If only one default variant is found (i.e only dark default or light default but not both),
+                 * treat it like any other variant.
+                 */
+                const variant = defaultDarkVariant.id ? defaultDarkVariant : defaultLightVariant;
+                this._themeMapping[`${themeName} ${variant.variantName}`] = { id: variant.id, cssLocation: variant.cssLocation };
+            }
+            //Add the default-theme as an additional option to the mapping
+            const defaultThemeId = this.getDefaultTheme();
+            if (defaultThemeId) {
+                const themeDetails = this._findThemeDetailsFromId(defaultThemeId);
+                if (themeDetails) {
+                    this._themeMapping["Default"] = { id: "default", cssLocation: themeDetails.cssLocation };
+                }
+            }
+            l.log({ l: "Default Theme", theme: defaultThemeId});
+            l.log({ l: "Preferred colorscheme", scheme: this.preferredColorScheme === ColorSchemePreference.Dark ? "dark" : "light" });
+            l.log({ l: "Result", themeMapping: this._themeMapping });
+         });
+    }
+
+    setTheme(themeName: string, themeVariant?: "light" | "dark" | "default", log?: ILogItem) {
+        this._platform.logger.wrapOrRun(log, { l: "change theme", name: themeName, variant: themeVariant }, () => {
+            let cssLocation: string;
+            let themeDetails = this._themeMapping[themeName];
+            if ("id" in themeDetails) {
+                cssLocation = themeDetails.cssLocation;
+            }
+            else {
+                if (!themeVariant) {
+                    throw new Error("themeVariant is undefined!");
+                }
+                cssLocation = themeDetails[themeVariant].cssLocation;
+            }
+            this._platform.replaceStylesheet(cssLocation);
+            this._platform.settingsStorage.setString("theme-name", themeName);
+            if (themeVariant) {
+                this._platform.settingsStorage.setString("theme-variant", themeVariant);
+            }
+            else {
+                this._platform.settingsStorage.remove("theme-variant");
+            }
+        });
+    }
+
+    /** Maps theme display name to theme information */
+    get themeMapping(): Record<string, ThemeInformation> {
+        return this._themeMapping;
+    }
+
+    async getActiveTheme(): Promise<{themeName: string, themeVariant?: string}> {
+        let themeName = await this._platform.settingsStorage.getString("theme-name");
+        let themeVariant = await this._platform.settingsStorage.getString("theme-variant");
+        if (!themeName || !this._themeMapping[themeName]) {
+            themeName = "Default" in this._themeMapping ? "Default" : Object.keys(this._themeMapping)[0];
+            if (!this._themeMapping[themeName][themeVariant]) {
+                themeVariant = "default" in this._themeMapping[themeName] ? "default" : undefined;
+            }
+        }
+        return { themeName, themeVariant };
+    }
+
+    getDefaultTheme(): string | undefined {
+        switch (this.preferredColorScheme) {
+            case ColorSchemePreference.Dark:
+                return this._platform.config["defaultTheme"]?.dark;
+            case ColorSchemePreference.Light:
+                return this._platform.config["defaultTheme"]?.light;
+        }
+    }
+
+    private _findThemeDetailsFromId(themeId: string): {themeName: string, cssLocation: string, variant?: string} | undefined {
+        for (const [themeName, themeData] of Object.entries(this._themeMapping)) {
+            if ("id" in themeData && themeData.id === themeId) {
+                return { themeName, cssLocation: themeData.cssLocation };
+            }
+            else if ("light" in themeData && themeData.light?.id === themeId) {
+                return { themeName, cssLocation: themeData.light.cssLocation, variant: "light" };
+            }
+            else if ("dark" in themeData && themeData.dark?.id === themeId) {
+                return { themeName, cssLocation: themeData.dark.cssLocation, variant: "dark" };
+            }
+        }
+    }
+
+    get preferredColorScheme(): ColorSchemePreference | undefined {
+        if (window.matchMedia("(prefers-color-scheme: dark)").matches) {
+            return ColorSchemePreference.Dark;
+        }
+        else if (window.matchMedia("(prefers-color-scheme: light)").matches) {
+            return ColorSchemePreference.Light;
+        }
+    }
+}
--- a/src/platform/web/assets/config.json
+++ b/src/platform/web/assets/config.json
@ -4,6 +4,6 @@
    "gatewayUrl": "https://matrix.org",
    "applicationServerKey": "BC-gpSdVHEXhvHSHS0AzzWrQoukv2BE7KzpoPO_FfPacqOo3l1pdqz7rSgmB04pZCWaHPz7XRe6fjLaC-WPDopM"
  },
-  "defaultHomeServer": "matrix.test.mystiq.app",
-  "bugReportEndpointUrl": "https://rageshake.test.mystiq.app/api/submit"
+  "defaultHomeServer": "matrix.org",
+  "bugReportEndpointUrl": "https://element.io/bugreports/submit"
 }
--- a/src/platform/web/dom/History.js
+++ b/src/platform/web/dom/History.js
@ -17,12 +17,6 @@ limitations under the License.
 import {BaseObservableValue} from "../../../observable/ObservableValue";

 export class History extends BaseObservableValue {
-    
-    constructor() {
-        super();
-        this._lastSessionHash = undefined;
-    }
-    
    handleEvent(event) {
        if (event.type === "hashchange") {
            this.emit(this.get());
@ -71,7 +65,6 @@ export class History extends BaseObservableValue {
    }

    onSubscribeFirst() {
-        this._lastSessionHash = window.localStorage?.getItem("hydrogen_last_url_hash");
        window.addEventListener('hashchange', this);
    }

@ -83,7 +76,7 @@ export class History extends BaseObservableValue {
        window.localStorage?.setItem("hydrogen_last_url_hash", hash);
    }

-    getLastSessionUrl() {
-        return this._lastSessionHash;
+    getLastUrl() {
+        return window.localStorage?.getItem("hydrogen_last_url_hash");
    }
 }
--- a/src/platform/web/dom/request/fetch.js
+++ b/src/platform/web/dom/request/fetch.js
@ -115,9 +115,6 @@ export function createFetchRequest(createTimeout, serviceWorkerHandler) {
                } else if (format === "buffer") {
                    body = await response.arrayBuffer();
                }
-                else if (format === "text") {
-                    body = await response.text();
-                }
            } catch (err) {
                // some error pages return html instead of json, ignore error
                if (!(err.name === "SyntaxError" && status >= 400)) {
--- a/src/platform/web/main.js
+++ b/src/platform/web/main.js
@ -17,7 +17,7 @@ limitations under the License.

 // import {RecordRequester, ReplayRequester} from "./matrix/net/request/replay";
 import {RootViewModel} from "../../domain/RootViewModel.js";
-import {createNavigation, createRouter} from "../../domain/navigation/index";
+import {createNavigation, createRouter} from "../../domain/navigation/index.js";
 // Don't use a default export here, as we use multiple entries during legacy build,
 // which does not support default exports,
 // see https://github.com/rollup/plugins/tree/master/packages/multi-entry
--- a/src/platform/web/theming/DerivedVariables.ts
+++ b/src/platform/web/theming/DerivedVariables.ts
@ -1,131 +0,0 @@
-/*
-Copyright 2020 The Matrix.org Foundation C.I.C.
- 
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/
-import {derive} from "./shared/color.mjs";
-
-export class DerivedVariables {
-    private _baseVariables: Record<string, string>;
-    private _variablesToDerive: string[]
-    private _isDark: boolean
-    private _aliases: Record<string, string> = {};
-    private _derivedAliases: string[] = [];
-
-    constructor(baseVariables: Record<string, string>, variablesToDerive: string[], isDark: boolean) {
-        this._baseVariables = baseVariables;
-        this._variablesToDerive = variablesToDerive;
-        this._isDark = isDark;
-    }
-
-    toVariables(): Record<string, string> {
-        const resolvedVariables: any = {};
-        this._detectAliases();
-        for (const variable of this._variablesToDerive) {
-            const resolvedValue = this._derive(variable);
-            if (resolvedValue) {
-                resolvedVariables[variable] = resolvedValue;
-            }
-        }
-        for (const [alias, variable] of Object.entries(this._aliases) as any) {
-            resolvedVariables[alias] = this._baseVariables[variable] ?? resolvedVariables[variable];
-        }
-        for (const variable of this._derivedAliases) {
-            const resolvedValue = this._deriveAlias(variable, resolvedVariables);
-            if (resolvedValue) {
-                resolvedVariables[variable] = resolvedValue;
-            }
-        }
-        return resolvedVariables;
-    }
-
-    private _detectAliases(): void {
-        const newVariablesToDerive: string[] = [];
-        for (const variable of this._variablesToDerive) {
-            const [alias, value] = variable.split("=");
-            if (value) {
-                this._aliases[alias] = value;
-            }
-            else {
-                newVariablesToDerive.push(variable);
-            }
-        }
-        this._variablesToDerive = newVariablesToDerive;
-    }
-
-    private _derive(variable: string): string | undefined {
-        const RE_VARIABLE_VALUE = /(.+)--(.+)-(.+)/;
-        const matches = variable.match(RE_VARIABLE_VALUE);
-        if (matches) {
-            const [, baseVariable, operation, argument] = matches;
-            const value = this._baseVariables[baseVariable];
-            if (!value ) {
-                if (this._aliases[baseVariable]) {
-                    this._derivedAliases.push(variable);
-                    return;
-                }
-                else {
-                    throw new Error(`Cannot find value for base variable "${baseVariable}"!`);
-                }
-            }
-            const resolvedValue = derive(value, operation, argument, this._isDark);
-            return resolvedValue;
-        }
-    }
-
-    private _deriveAlias(variable: string, resolvedVariables: Record<string, string>): string | undefined {
-        const RE_VARIABLE_VALUE = /(.+)--(.+)-(.+)/;
-        const matches = variable.match(RE_VARIABLE_VALUE);
-        if (matches) {
-            const [, baseVariable, operation, argument] = matches;
-            const value = resolvedVariables[baseVariable];
-            if (!value ) {
-                throw new Error(`Cannot find value for alias "${baseVariable}" when trying to derive ${variable}!`);
-            }
-            const resolvedValue = derive(value, operation, argument, this._isDark);
-            return resolvedValue;
-        }
-    }
-}
-
-import * as pkg from "off-color";
-// @ts-ignore 
-const offColor = pkg.offColor ?? pkg.default.offColor;
-
-export function tests() {
-    return {
-        "Simple variable derivation": assert => {
-            const deriver = new DerivedVariables({ "background-color": "#ff00ff" }, ["background-color--darker-5"], false);
-            const result = deriver.toVariables();
-            const resultColor = offColor("#ff00ff").darken(5/100).hex();
-            assert.deepEqual(result, {"background-color--darker-5": resultColor});
-        },
-
-        "For dark themes, lighten and darken are inverted": assert => {
-            const deriver = new DerivedVariables({ "background-color": "#ff00ff" }, ["background-color--darker-5"], true);
-            const result = deriver.toVariables();
-            const resultColor = offColor("#ff00ff").lighten(5/100).hex();
-            assert.deepEqual(result, {"background-color--darker-5": resultColor});
-        },
-
-        "Aliases can be derived": assert => {
-            const deriver = new DerivedVariables({ "background-color": "#ff00ff" }, ["my-awesome-alias=background-color","my-awesome-alias--darker-5"], false);
-            const result = deriver.toVariables();
-            const resultColor = offColor("#ff00ff").darken(5/100).hex();
-            assert.deepEqual(result, {
-                "my-awesome-alias": "#ff00ff",
-                "my-awesome-alias--darker-5": resultColor,
-            });
-        },
-    }
-}
--- a/src/platform/web/theming/IconColorizer.ts
+++ b/src/platform/web/theming/IconColorizer.ts
@ -1,79 +0,0 @@
-/*
-Copyright 2020 The Matrix.org Foundation C.I.C.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/
-import type {Platform} from "../Platform.js";
-import {getColoredSvgString} from "./shared/svg-colorizer.mjs";
-
-type ParsedStructure = {
-    [variableName: string]: {
-        svg: Promise<{ status: number; body: string }>;
-        primary: string | null;
-        secondary: string | null;
-    };
-};
-
-export class IconColorizer {
-    private _iconVariables: Record<string, string>;
-    private _resolvedVariables: Record<string, string>;
-    private _manifestLocation: string;
-    private _platform: Platform;
-
-    constructor(platform: Platform, iconVariables: Record<string, string>, resolvedVariables: Record<string, string>, manifestLocation: string) {
-        this._platform = platform;
-        this._iconVariables = iconVariables;
-        this._resolvedVariables = resolvedVariables;
-        this._manifestLocation = manifestLocation;
-    }
-
-    async toVariables(): Promise<Record<string, string>> {
-        const { parsedStructure, promises } = await this._fetchAndParseIcons();
-        await Promise.all(promises);
-        return this._produceColoredIconVariables(parsedStructure);
-    }
-
-    private async _fetchAndParseIcons(): Promise<{ parsedStructure: ParsedStructure, promises: any[] }> {
-        const promises: any[] = [];
-        const parsedStructure: ParsedStructure = {};
-        for (const [variable, url] of Object.entries(this._iconVariables)) {
-            const urlObject = new URL(`https://${url}`);
-            const pathWithoutQueryParams = urlObject.hostname;
-            const relativePath = new URL(pathWithoutQueryParams, new URL(this._manifestLocation, window.location.origin));
-            const responsePromise = this._platform.request(relativePath, { method: "GET", format: "text", cache: true, }).response()
-            promises.push(responsePromise);
-            const searchParams = urlObject.searchParams;
-            parsedStructure[variable] = {
-                svg: responsePromise,
-                primary: searchParams.get("primary"),
-                secondary: searchParams.get("secondary")
-            };
-        }
-        return { parsedStructure, promises };
-    }
-
-    private async _produceColoredIconVariables(parsedStructure: ParsedStructure): Promise<Record<string, string>> {
-        let coloredVariables: Record<string, string> = {};
-        for (const [variable, { svg, primary, secondary }] of Object.entries(parsedStructure)) {
-            const { body: svgCode } = await svg;
-            if (!primary) {
-                throw new Error(`Primary color variable ${primary} not in list of variables!`);
-            }
-            const primaryColor = this._resolvedVariables[primary], secondaryColor = this._resolvedVariables[secondary!];
-            const coloredSvgCode = getColoredSvgString(svgCode, primaryColor, secondaryColor);
-            const dataURI = `url('data:image/svg+xml;utf8,${encodeURIComponent(coloredSvgCode)}')`;
-            coloredVariables[variable] = dataURI;
-        }
-        return coloredVariables;
-    }
-}
--- a/src/platform/web/theming/ThemeLoader.ts
+++ b/src/platform/web/theming/ThemeLoader.ts
@ -1,188 +0,0 @@
-/*
-Copyright 2020 The Matrix.org Foundation C.I.C.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/
-
-import type {ILogItem} from "../../../logging/types";
-import type {Platform} from "../Platform.js";
-import {RuntimeThemeParser} from "./parsers/RuntimeThemeParser";
-import type {Variant, ThemeInformation} from "./parsers/types";
-import {ColorSchemePreference} from "./parsers/types";
-import {BuiltThemeParser} from "./parsers/BuiltThemeParser";
-
-export class ThemeLoader {
-    private _platform: Platform;
-    private _themeMapping: Record<string, ThemeInformation>;
-    private _injectedVariables?: Record<string, string>;
-
-    constructor(platform: Platform) {
-        this._platform = platform;
-    }
-
-    async init(manifestLocations: string[], log?: ILogItem): Promise<void> {
-        await this._platform.logger.wrapOrRun(log, "ThemeLoader.init", async (log) => {
-            const results = await Promise.all(
-                manifestLocations.map(location => this._platform.request(location, { method: "GET", format: "json", cache: true, }).response())
-            );
-            const runtimeThemeParser = new RuntimeThemeParser(this._platform, this.preferredColorScheme);
-            const builtThemeParser = new BuiltThemeParser(this.preferredColorScheme);
-            const runtimeThemePromises: Promise<void>[] = [];
-            for (let i = 0; i < results.length; ++i) {
-                const { body } = results[i];
-                try {
-                    if (body.extends) {
-                        const indexOfBaseManifest = results.findIndex(manifest => manifest.body.id === body.extends);
-                        if (indexOfBaseManifest === -1) {
-                            throw new Error(`Base manifest for derived theme at ${manifestLocations[i]} not found!`);
-                        }
-                        const {body: baseManifest} = results[indexOfBaseManifest];
-                        const baseManifestLocation = manifestLocations[indexOfBaseManifest];
-                        const promise = runtimeThemeParser.parse(body, baseManifest, baseManifestLocation, log);
-                        runtimeThemePromises.push(promise);
-                    }
-                    else {
-                        builtThemeParser.parse(body, manifestLocations[i], log);
-                    }
-                }
-                catch(e) {
-                    console.error(e);
-                }
-            }
-            await Promise.all(runtimeThemePromises);
-            this._themeMapping = { ...builtThemeParser.themeMapping, ...runtimeThemeParser.themeMapping };
-            Object.assign(this._themeMapping, builtThemeParser.themeMapping, runtimeThemeParser.themeMapping);
-            this._addDefaultThemeToMapping(log);
-            log.log({ l: "Preferred colorscheme", scheme: this.preferredColorScheme === ColorSchemePreference.Dark ? "dark" : "light" });
-            log.log({ l: "Result", themeMapping: this._themeMapping });
-        });
-    }
-
-    setTheme(themeName: string, themeVariant?: "light" | "dark" | "default", log?: ILogItem) {
-        this._platform.logger.wrapOrRun(log, { l: "change theme", name: themeName, variant: themeVariant }, () => {
-            let cssLocation: string, variables: Record<string, string>;
-            let themeDetails = this._themeMapping[themeName];
-            if ("id" in themeDetails) {
-                cssLocation = themeDetails.cssLocation;
-                variables = themeDetails.variables;
-            }
-            else {
-                if (!themeVariant) {
-                    throw new Error("themeVariant is undefined!");
-                }
-                cssLocation = themeDetails[themeVariant].cssLocation;
-                variables = themeDetails[themeVariant].variables;
-            }
-            this._platform.replaceStylesheet(cssLocation);
-            if (variables) {
-                log?.log({l: "Derived Theme", variables});
-                this._injectCSSVariables(variables);
-            }
-            else {
-                this._removePreviousCSSVariables();
-            }
-            this._platform.settingsStorage.setString("theme-name", themeName);
-            if (themeVariant) {
-                this._platform.settingsStorage.setString("theme-variant", themeVariant);
-            }
-            else {
-                this._platform.settingsStorage.remove("theme-variant");
-            }
-        });
-    }
-
-    private _injectCSSVariables(variables: Record<string, string>): void {
-        const root = document.documentElement;
-        for (const [variable, value] of Object.entries(variables)) {
-            root.style.setProperty(`--${variable}`, value);
-        }
-        this._injectedVariables = variables;
-    }
-
-    private _removePreviousCSSVariables(): void {
-        if (!this._injectedVariables) {
-            return;
-        }
-        const root = document.documentElement;
-        for (const variable of Object.keys(this._injectedVariables)) {
-            root.style.removeProperty(`--${variable}`);
-        }
-        this._injectedVariables = undefined;
-    }
-
-    /** Maps theme display name to theme information */
-    get themeMapping(): Record<string, ThemeInformation> {
-        return this._themeMapping;
-    }
-
-    async getActiveTheme(): Promise<{themeName: string, themeVariant?: string}> {
-        let themeName = await this._platform.settingsStorage.getString("theme-name");
-        let themeVariant = await this._platform.settingsStorage.getString("theme-variant");
-        if (!themeName || !this._themeMapping[themeName]) {
-            themeName = "Default" in this._themeMapping ? "Default" : Object.keys(this._themeMapping)[0];
-            if (!this._themeMapping[themeName][themeVariant]) {
-                themeVariant = "default" in this._themeMapping[themeName] ? "default" : undefined;
-            }
-        }
-        return { themeName, themeVariant };
-    }
-
-    getDefaultTheme(): string | undefined {
-        switch (this.preferredColorScheme) {
-            case ColorSchemePreference.Dark:
-                return this._platform.config["defaultTheme"]?.dark;
-            case ColorSchemePreference.Light:
-                return this._platform.config["defaultTheme"]?.light;
-        }
-    }
-
-    private _findThemeDetailsFromId(themeId: string): {themeName: string, themeData: Partial<Variant>} | undefined {
-        for (const [themeName, themeData] of Object.entries(this._themeMapping)) {
-            if ("id" in themeData && themeData.id === themeId) {
-                return { themeName, themeData };
-            }
-            else if ("light" in themeData && themeData.light?.id === themeId) {
-                return { themeName, themeData: themeData.light };
-            }
-            else if ("dark" in themeData && themeData.dark?.id === themeId) {
-                return { themeName, themeData: themeData.dark };
-            }
-        }
-    }
-
-    private _addDefaultThemeToMapping(log: ILogItem) {
-        log.wrap("addDefaultThemeToMapping", l => { 
-            const defaultThemeId = this.getDefaultTheme();
-            if (defaultThemeId) {
-                const themeDetails = this._findThemeDetailsFromId(defaultThemeId);
-                if (themeDetails) {
-                    this._themeMapping["Default"] = { id: "default", cssLocation: themeDetails.themeData.cssLocation! };
-                    const variables = themeDetails.themeData.variables;
-                    if (variables) {
-                        this._themeMapping["Default"].variables = variables;
-                    }
-                }
-            }
-            l.log({ l: "Default Theme", theme: defaultThemeId});
-        });
-    }
-
-    get preferredColorScheme(): ColorSchemePreference | undefined {
-        if (window.matchMedia("(prefers-color-scheme: dark)").matches) {
-            return ColorSchemePreference.Dark;
-        }
-        else if (window.matchMedia("(prefers-color-scheme: light)").matches) {
-            return ColorSchemePreference.Light;
-        }
-    }
-}
--- a/src/platform/web/theming/parsers/BuiltThemeParser.ts
+++ b/src/platform/web/theming/parsers/BuiltThemeParser.ts
@ -1,106 +0,0 @@
-/*
-Copyright 2020 The Matrix.org Foundation C.I.C.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/
-
-import type {ThemeInformation} from "./types";
-import type {ThemeManifest} from "../../../types/theme";
-import type {ILogItem} from "../../../../logging/types";
-import {ColorSchemePreference} from "./types";
-
-export class BuiltThemeParser {
-    private _themeMapping: Record<string, ThemeInformation> = {};
-    private _preferredColorScheme?: ColorSchemePreference;
-
-    constructor(preferredColorScheme?: ColorSchemePreference) {
-        this._preferredColorScheme = preferredColorScheme;
-    }
-
-    parse(manifest: ThemeManifest, manifestLocation: string, log: ILogItem) {
-        log.wrap("BuiltThemeParser.parse", () => {
-            /*
-            After build has finished, the source section of each theme manifest
-            contains `built-assets` which is a mapping from the theme-id to
-            cssLocation of theme
-            */
-            const builtAssets: Record<string, string> = manifest.source?.["built-assets"];
-            const themeName = manifest.name;
-            if (!themeName) {
-                throw new Error(`Theme name not found in manifest at ${manifestLocation}`);
-            }
-            let defaultDarkVariant: any = {}, defaultLightVariant: any = {};
-            for (let [themeId, cssLocation] of Object.entries(builtAssets)) {
-                try {
-                    /**
-                     * This cssLocation is relative to the location of the manifest file.
-                     * So we first need to resolve it relative to the root of this hydrogen instance.
-                     */
-                    cssLocation = new URL(cssLocation, new URL(manifestLocation, window.location.origin)).href;
-                }
-                catch {
-                    continue;
-                }
-                const variant = themeId.match(/.+-(.+)/)?.[1];
-                const variantDetails = manifest.values?.variants[variant!];
-                if (!variantDetails) {
-                    throw new Error(`Variant ${variant} is missing in manifest at ${manifestLocation}`);
-                }
-                const { name: variantName, default: isDefault, dark } = variantDetails;
-                const themeDisplayName = `${themeName} ${variantName}`;
-                if (isDefault) {
-                    /**
-                     * This is a default variant!
-                     * We'll add these to the themeMapping (separately) keyed with just the
-                     * theme-name (i.e "Element" instead of "Element Dark").
-                     * We need to be able to distinguish them from other variants!
-                     * 
-                     * This allows us to render radio-buttons with "dark" and
-                     * "light" options.
-                    */
-                    const defaultVariant = dark ? defaultDarkVariant : defaultLightVariant;
-                    defaultVariant.variantName = variantName;
-                    defaultVariant.id = themeId
-                    defaultVariant.cssLocation = cssLocation;
-                    continue;
-                }
-                // Non-default variants are keyed in themeMapping with "theme_name variant_name"
-                // eg: "Element Dark"
-                this._themeMapping[themeDisplayName] = {
-                    cssLocation,
-                    id: themeId
-                };
-            }
-            if (defaultDarkVariant.id && defaultLightVariant.id) {
-                /**
-                 * As mentioned above, if there's both a default dark and a default light variant,
-                 * add them to themeMapping separately.
-                 */
-                const defaultVariant = this._preferredColorScheme === ColorSchemePreference.Dark ? defaultDarkVariant : defaultLightVariant;
-                this._themeMapping[themeName] = { dark: defaultDarkVariant, light: defaultLightVariant, default: defaultVariant };
-            }
-            else {
-                /**
-                 * If only one default variant is found (i.e only dark default or light default but not both),
-                 * treat it like any other variant.
-                 */
-                const variant = defaultDarkVariant.id ? defaultDarkVariant : defaultLightVariant;
-                this._themeMapping[`${themeName} ${variant.variantName}`] = { id: variant.id, cssLocation: variant.cssLocation };
-            }
-         });
-    }
-
-    get themeMapping(): Record<string, ThemeInformation> {
-        return this._themeMapping;
-    }
-}
--- a/src/platform/web/theming/parsers/RuntimeThemeParser.ts
+++ b/src/platform/web/theming/parsers/RuntimeThemeParser.ts
@ -1,98 +0,0 @@
-/*
-Copyright 2020 The Matrix.org Foundation C.I.C.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/
-import type {ThemeInformation} from "./types";
-import type {Platform} from "../../Platform.js";
-import type {ThemeManifest} from "../../../types/theme";
-import {ColorSchemePreference} from "./types";
-import {IconColorizer} from "../IconColorizer";
-import {DerivedVariables} from "../DerivedVariables";
-import {ILogItem} from "../../../../logging/types";
-
-export class RuntimeThemeParser {
-    private _themeMapping: Record<string, ThemeInformation> = {};
-    private _preferredColorScheme?: ColorSchemePreference;
-    private _platform: Platform;
-
-    constructor(platform: Platform, preferredColorScheme?: ColorSchemePreference) {
-        this._preferredColorScheme = preferredColorScheme;
-        this._platform = platform;
-    }
-
-    async parse(manifest: ThemeManifest, baseManifest: ThemeManifest, baseManifestLocation: string, log: ILogItem): Promise<void> {
-        await log.wrap("RuntimeThemeParser.parse", async () => {
-            const {cssLocation, derivedVariables, icons} = this._getSourceData(baseManifest, baseManifestLocation, log);
-            const themeName = manifest.name;
-            if (!themeName) {
-                throw new Error(`Theme name not found in manifest!`);
-            }
-            let defaultDarkVariant: any = {}, defaultLightVariant: any = {};
-            for (const [variant, variantDetails] of Object.entries(manifest.values?.variants!) as [string, any][]) {
-                try {
-                    const themeId = `${manifest.id}-${variant}`;
-                    const { name: variantName, default: isDefault, dark, variables } = variantDetails;
-                    const resolvedVariables = new DerivedVariables(variables, derivedVariables, dark).toVariables();
-                    Object.assign(variables, resolvedVariables);
-                    const iconVariables = await new IconColorizer(this._platform, icons, variables, baseManifestLocation).toVariables();
-                    Object.assign(variables, resolvedVariables, iconVariables);
-                    const themeDisplayName = `${themeName} ${variantName}`;
-                    if (isDefault) {
-                        const defaultVariant = dark ? defaultDarkVariant : defaultLightVariant;
-                        Object.assign(defaultVariant, { variantName, id: themeId, cssLocation, variables });
-                        continue;
-                    }
-                    this._themeMapping[themeDisplayName] = { cssLocation, id: themeId, variables: variables, };
-                }
-                catch (e) {
-                    console.error(e);
-                    continue;
-                }
-            }
-            if (defaultDarkVariant.id && defaultLightVariant.id) {
-                const defaultVariant = this._preferredColorScheme === ColorSchemePreference.Dark ? defaultDarkVariant : defaultLightVariant;
-                this._themeMapping[themeName] = { dark: defaultDarkVariant, light: defaultLightVariant, default: defaultVariant };
-            }
-            else {
-                const variant = defaultDarkVariant.id ? defaultDarkVariant : defaultLightVariant;
-                this._themeMapping[`${themeName} ${variant.variantName}`] = { id: variant.id, cssLocation: variant.cssLocation };
-            }
-        });
-    }
-
-    private _getSourceData(manifest: ThemeManifest, location: string, log: ILogItem)
-        : { cssLocation: string, derivedVariables: string[], icons: Record<string, string>} {
-        return log.wrap("getSourceData", () => {
-            const runtimeCSSLocation = manifest.source?.["runtime-asset"];
-            if (!runtimeCSSLocation) {
-                throw new Error(`Run-time asset not found in source section for theme at ${location}`);
-            }
-            const cssLocation = new URL(runtimeCSSLocation, new URL(location, window.location.origin)).href;
-            const derivedVariables = manifest.source?.["derived-variables"];
-            if (!derivedVariables) {
-                throw new Error(`Derived variables not found in source section for theme at ${location}`);
-            }
-            const icons = manifest.source?.["icon"];
-            if (!icons) {
-                throw new Error(`Icon mapping not found in source section for theme at ${location}`);
-            }
-            return { cssLocation, derivedVariables, icons };
-         });
-    }
-
-    get themeMapping(): Record<string, ThemeInformation> {
-        return this._themeMapping;
-    }
-
-}
--- a/src/platform/web/theming/parsers/types.ts
+++ b/src/platform/web/theming/parsers/types.ts
@ -1,38 +0,0 @@
-/*
-Copyright 2020 The Matrix.org Foundation C.I.C.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/
-
-export type NormalVariant = {
-    id: string;
-    cssLocation: string;
-    variables?: any;
-};
-
-export type Variant = NormalVariant & {
-    variantName: string;
-};
-
-export type DefaultVariant = {
-    dark: Variant;
-    light: Variant;
-    default: Variant;
-}
-
-export type ThemeInformation = NormalVariant | DefaultVariant; 
-
-export enum ColorSchemePreference {
-    Dark,
-    Light
-};
--- a/src/platform/web/theming/shared/svg-colorizer.mjs
+++ b/src/platform/web/theming/shared/svg-colorizer.mjs
@ -1,24 +0,0 @@
-/*
-Copyright 2021 The Matrix.org Foundation C.I.C.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/
-
-export function getColoredSvgString(svgString, primaryColor, secondaryColor) {
-    let coloredSVGCode = svgString.replaceAll("#ff00ff", primaryColor);
-    coloredSVGCode = coloredSVGCode.replaceAll("#00ffff", secondaryColor);
-    if (svgString === coloredSVGCode) {
-        throw new Error("svg-colorizer made no color replacements! The input svg should only contain colors #ff00ff (primary, case-sensitive) and #00ffff (secondary, case-sensitive).");
-    }
-    return coloredSVGCode;
-}
--- a/src/platform/web/ui/css/themes/element/theme.css
+++ b/src/platform/web/ui/css/themes/element/theme.css
@ -521,62 +521,6 @@ a {

 .RoomView_error {
    color: var(--error-color);
-    background : #efefef;
-    height : 0px;
-    font-weight : bold;
-    transition : 0.25s all ease-out;
-    padding-right : 20px;
-    padding-left : 20px;
-}
-
-.RoomView_error div{
-    overflow : hidden;
-    height: 100%;
-    width: 100%;
-    position : relative;
-    display : flex;
-    align-items : center;
-}
-
-.RoomView_error:not(:empty) {
-    height : auto;
-    padding-top : 20px;
-    padding-bottom : 20px;
-}
-
-.RoomView_error p {
-    position : relative;
-    display : block;
-    width : 100%;
-    height : auto;
-    margin : 0;
-}
-
-.RoomView_error button {
-    width : 40px;
-    padding-top : 20px;
-    padding-bottom : 20px;
-    background : none;
-    border : none;
-    position : relative;
-    border-radius : 5px;
-    transition: 0.1s all ease-out;
-    cursor: pointer;
-}
-
-.RoomView_error button:hover {
-    background : #cfcfcf;
-}
-
-.RoomView_error button:before {
-    content:"\274c";
-    position : absolute;
-    top : 15px;
-    left: 9px;
-    width : 20px;
-    height : 10px;
-    font-size : 10px;
-    align-self : middle;
 }

 .MessageComposer_replyPreview .Timeline_message {
--- a/src/platform/web/ui/session/room/RoomView.js
+++ b/src/platform/web/ui/session/room/RoomView.js
@ -46,13 +46,7 @@ export class RoomView extends TemplateView {
                })
            ]),
            t.div({className: "RoomView_body"}, [
-                t.div({className: "RoomView_error"}, [
-                    t.if(vm => vm.error, t => t.div( 
-                        [
-                            t.p({}, vm => vm.error),
-                            t.button({ className: "RoomView_error_closerButton", onClick: evt => vm.dismissError(evt) })
-                        ])
-                )]),
+                t.div({className: "RoomView_error"}, vm => vm.error),
                t.mapView(vm => vm.timelineViewModel, timelineViewModel => {
                    return timelineViewModel ?
                        new TimelineView(timelineViewModel, this._viewClassForTile) :
--- a/vite.common-config.js
+++ b/vite.common-config.js
@ -8,8 +8,8 @@ const path = require("path");
 const manifest = require("./package.json");
 const version = manifest.version;
 const compiledVariables = new Map();
-import {buildColorizedSVG as replacer} from "./scripts/postcss/svg-builder.mjs";
-import {derive} from "./src/platform/web/theming/shared/color.mjs";
+const derive = require("./scripts/postcss/color").derive;
+const replacer = require("./scripts/postcss/svg-colorizer").buildColorizedSVG;

 const commonOptions = {
    logLevel: "warn",
--- a/vite.sdk-assets-config.js
+++ b/vite.sdk-assets-config.js
@ -36,7 +36,7 @@ export default mergeOptions(commonOptions, {
    plugins: [
        themeBuilder({
            themeConfig: {
-                themes: ["./src/platform/web/ui/css/themes/element"],
+                themes: { element: "./src/platform/web/ui/css/themes/element" },
                default: "element",
            },
            compiledVariables,
--- a/yarn.lock
+++ b/yarn.lock
@ -77,11 +77,6 @@
    "@nodelib/fs.scandir" "2.1.5"
    fastq "^1.6.0"

-"@trysound/sax@0.2.0":
-  version "0.2.0"
-  resolved "https://registry.yarnpkg.com/@trysound/sax/-/sax-0.2.0.tgz#cccaab758af56761eb7bf37af6f03f326dd798ad"
-  integrity sha512-L7z9BgrNEcYyUYtF+HaEfiS5ebkh9jXqbszz7pC0hRBPaatV0XjSD3+eHrpqFemQfgwiFF0QPIarnIihIDn7OA==
-
 "@types/json-schema@^7.0.7":
  version "7.0.9"
  resolved "https://registry.yarnpkg.com/@types/json-schema/-/json-schema-7.0.9.tgz#97edc9037ea0c38585320b28964dde3b39e4660d"
@ -352,11 +347,6 @@ commander@^6.1.0:
  resolved "https://registry.yarnpkg.com/commander/-/commander-6.2.1.tgz#0792eb682dfbc325999bb2b84fddddba110ac73c"
  integrity sha512-U7VdrJFnJgo4xjrHpTzu0yrHPGImdsmD95ZlgYSEajAn2JKzDhDTPG9kBTefmObL2w/ngeZnilk+OV9CG3d7UA==

-commander@^7.2.0:
-  version "7.2.0"
-  resolved "https://registry.yarnpkg.com/commander/-/commander-7.2.0.tgz#a36cb57d0b501ce108e4d20559a150a391d97ab7"
-  integrity sha512-QrWXB+ZQSVPmIWIhtEO9H+gwHaMGYiF5ChvoJ+K9ZGHG/sVsa6yiesAD1GC/x46sET00Xlwo1u49RVVVzvcSkw==
-
 concat-map@0.0.1:
  version "0.0.1"
  resolved "https://registry.yarnpkg.com/concat-map/-/concat-map-0.0.1.tgz#d8a96bd77fd68df7793a73036a3ba0d5405d477b"
@ -392,26 +382,11 @@ css-select@^4.1.3:
    domutils "^2.6.0"
    nth-check "^2.0.0"

-css-tree@^1.1.2, css-tree@^1.1.3:
-  version "1.1.3"
-  resolved "https://registry.yarnpkg.com/css-tree/-/css-tree-1.1.3.tgz#eb4870fb6fd7707327ec95c2ff2ab09b5e8db91d"
-  integrity sha512-tRpdppF7TRazZrjJ6v3stzv93qxRcSsFmW6cX0Zm2NVKpxE1WV1HblnghVv9TreireHkqI/VDEsfolRF1p6y7Q==
-  dependencies:
-    mdn-data "2.0.14"
-    source-map "^0.6.1"
-
 css-what@^5.0.0:
  version "5.0.1"
  resolved "https://registry.yarnpkg.com/css-what/-/css-what-5.0.1.tgz#3efa820131f4669a8ac2408f9c32e7c7de9f4cad"
  integrity sha512-FYDTSHb/7KXsWICVsxdmiExPjCfRC4qRFBdVwv7Ax9hMnvMmEjP9RfxTEZ3qPZGmADDn2vAKSo9UcN1jKVYscg==

-csso@^4.2.0:
-  version "4.2.0"
-  resolved "https://registry.yarnpkg.com/csso/-/csso-4.2.0.tgz#ea3a561346e8dc9f546d6febedd50187cf389529"
-  integrity sha512-wvlcdIbf6pwKEk7vHj8/Bkc0B4ylXZruLvOgs9doS5eOsOpuodOV2zJChSpkp+pRpYQLQMeF04nr3Z68Sta9jA==
-  dependencies:
-    css-tree "^1.1.2"
-
 cuint@^0.2.2:
  version "0.2.2"
  resolved "https://registry.yarnpkg.com/cuint/-/cuint-0.2.2.tgz#408086d409550c2631155619e9fa7bcadc3b991b"
@ -1222,11 +1197,6 @@ lru-cache@^6.0.0:
  dependencies:
    yallist "^4.0.0"

-mdn-data@2.0.14:
-  version "2.0.14"
-  resolved "https://registry.yarnpkg.com/mdn-data/-/mdn-data-2.0.14.tgz#7113fc4281917d63ce29b43446f701e68c25ba50"
-  integrity sha512-dn6wd0uw5GsdswPFfsgMp5NSB0/aDe6fK94YJV/AJDYXL6HVLWBsxeq7js7Ad+mU2K9LAlwpk6kN2D5mwCPVow==
-
 mdn-polyfills@^5.20.0:
  version "5.20.0"
  resolved "https://registry.yarnpkg.com/mdn-polyfills/-/mdn-polyfills-5.20.0.tgz#ca8247edf20a4f60dec6804372229812b348260b"
@ -1530,7 +1500,7 @@ source-map-js@^1.0.2:
  resolved "https://registry.yarnpkg.com/source-map-js/-/source-map-js-1.0.2.tgz#adbc361d9c62df380125e7f161f71c826f1e490c"
  integrity sha512-R0XvVJ9WusLiqTCEiGCmICCMplcCkIwwR11mOSD9CR5u+IXYdiseeEuXCVAjS54zqwkLcPNnmU4OeJ6tUrWhDw==

-source-map@^0.6.1, source-map@~0.6.1:
+source-map@~0.6.1:
  version "0.6.1"
  resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.6.1.tgz#74722af32e9614e9c287a8d0bbde48b5e2f1a263"
  integrity sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==
@ -1540,11 +1510,6 @@ sprintf-js@~1.0.2:
  resolved "https://registry.yarnpkg.com/sprintf-js/-/sprintf-js-1.0.3.tgz#04e6926f662895354f3dd015203633b857297e2c"
  integrity sha1-BOaSb2YolTVPPdAVIDYzuFcpfiw=

-stable@^0.1.8:
-  version "0.1.8"
-  resolved "https://registry.yarnpkg.com/stable/-/stable-0.1.8.tgz#836eb3c8382fe2936feaf544631017ce7d47a3cf"
-  integrity sha512-ji9qxRnOVfcuLDySj9qzhGSEFVobyt1kIOSkj1qZzYLzq7Tos/oUUWvotUPQLlrsidqsK6tBH89Bc9kL5zHA6w==
-
 string-width@^4.2.0:
  version "4.2.2"
  resolved "https://registry.yarnpkg.com/string-width/-/string-width-4.2.2.tgz#dafd4f9559a7585cfba529c6a0a4f73488ebd4c5"
@ -1585,19 +1550,6 @@ supports-preserve-symlinks-flag@^1.0.0:
  resolved "https://registry.yarnpkg.com/supports-preserve-symlinks-flag/-/supports-preserve-symlinks-flag-1.0.0.tgz#6eda4bd344a3c94aea376d4cc31bc77311039e09"
  integrity sha512-ot0WnXS9fgdkgIcePe6RHNk1WA8+muPa6cSjeR3V8K27q9BB1rTE3R1p7Hv0z1ZyAc8s6Vvv8DIyWf681MAt0w==

-svgo@^2.8.0:
-  version "2.8.0"
-  resolved "https://registry.yarnpkg.com/svgo/-/svgo-2.8.0.tgz#4ff80cce6710dc2795f0c7c74101e6764cfccd24"
-  integrity sha512-+N/Q9kV1+F+UeWYoSiULYo4xYSDQlTgb+ayMobAXPwMnLvop7oxKMo9OzIrX5x3eS4L4f2UHhc9axXwY8DpChg==
-  dependencies:
-    "@trysound/sax" "0.2.0"
-    commander "^7.2.0"
-    css-select "^4.1.3"
-    css-tree "^1.1.3"
-    csso "^4.2.0"
-    picocolors "^1.0.0"
-    stable "^0.1.8"
-
 table@^6.0.9:
  version "6.7.1"
  resolved "https://registry.yarnpkg.com/table/-/table-6.7.1.tgz#ee05592b7143831a8c94f3cee6aae4c1ccef33e2"
@ -1665,10 +1617,10 @@ type-fest@^0.20.2:
  resolved "https://registry.yarnpkg.com/type-fest/-/type-fest-0.20.2.tgz#1bf207f4b28f91583666cb5fbd327887301cd5f4"
  integrity sha512-Ne+eE4r0/iWnpAxD852z3A+N0Bt5RN//NjJwRd2VFHEmrywxf5vsZlh4R6lixl6B+wz/8d+maTSAkN1FIkI3LQ==

-typescript@^4.7.0:
-  version "4.7.4"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.7.4.tgz#1a88596d1cf47d59507a1bcdfb5b9dfe4d488235"
-  integrity sha512-C0WQT0gezHuw6AdY1M2jxUO83Rjf0HP7Sk1DtXj6j1EwkQNZrHAg2XPWlq62oqEhYvONq5pkC2Y9oPljWToLmQ==
+typescript@^4.3.5:
+  version "4.3.5"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.3.5.tgz#4d1c37cc16e893973c45a06886b7113234f119f4"
+  integrity sha512-DqQgihaQ9cUrskJo9kIyW/+g0Vxsk8cDtZ52a3NGh0YNTfpUSArXSohyUGnvbPazEPLu398C0UxmKSOrPumUzA==

 typeson-registry@^1.0.0-alpha.20:
  version "1.0.0-alpha.39"