From a094abf4da81e58eefc6b73c9be3a8710f9ec4be Mon Sep 17 00:00:00 2001
From: Bruno Windels <brunow@matrix.org>
Date: Tue, 18 Aug 2020 11:47:20 +0200
Subject: [PATCH] remove comments in js bundles, saves ~100kb

---
 package.json      | 1 +
 scripts/build.mjs | 8 ++++++--
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/package.json b/package.json
index a82ab0e3..ea98e947 100644
--- a/package.json
+++ b/package.json
@@ -41,6 +41,7 @@
     "postcss-url": "^8.0.0",
     "regenerator-runtime": "^0.13.7",
     "rollup": "^1.15.6",
+    "rollup-plugin-cleanup": "^3.1.1",
     "serve-static": "^1.13.2",
     "xxhash": "^0.3.0"
   }
diff --git a/scripts/build.mjs b/scripts/build.mjs
index 507aa967..3ae55cad 100644
--- a/scripts/build.mjs
+++ b/scripts/build.mjs
@@ -34,6 +34,7 @@ import { nodeResolve } from '@rollup/plugin-node-resolve';
 import commonjs from '@rollup/plugin-commonjs';
 // multi-entry plugin so we can add polyfill file to main
 import multi from '@rollup/plugin-multi-entry';
+import removeJsComments from 'rollup-plugin-cleanup';
 // replace urls of asset names with content hashed version
 import postcssUrl from "postcss-url";
 
@@ -173,7 +174,10 @@ async function buildHtml(doc, version, assetPaths, manifestPath) {
 
 async function buildJs() {
     // create js bundle
-    const bundle = await rollup.rollup({input: 'src/main.js'});
+    const bundle = await rollup.rollup({
+        input: 'src/main.js',
+        plugins: [removeJsComments({comments: "none"})]
+    });
     const {output} = await bundle.generate({
         format: 'es',
         name: `${PROJECT_ID}Bundle`
@@ -203,7 +207,7 @@ async function buildJsLegacy() {
     // create js bundle
     const rollupConfig = {
         input: ['src/legacy-polyfill.js', 'src/main.js'],
-        plugins: [multi(), commonjs(), nodeResolve(), babelPlugin]
+        plugins: [multi(), commonjs(), nodeResolve(), babelPlugin, removeJsComments({comments: "none"})]
     };
     const bundle = await rollup.rollup(rollupConfig);
     const {output} = await bundle.generate({