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hydrogen-web/doc/SDK.md

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# How to use Hydrogen as an SDK
If you want to use end-to-end encryption, it is recommended to use a [supported build system](../src/sdk/paths/) (currently only vite) to be able to locate the olm library files.
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**NOTE**: For now, these instructions will only work at development time, support when building (e.g. `vite build`) is being worked on and tracked in [#529](https://github.com/vector-im/hydrogen-web/issues/529).
You can create a project using the following commands
```sh
# you can pick "vanilla-ts" here for project type if you're not using react or vue
yarn create vite
cd <your-project-name>
yarn
yarn add https://github.com/vector-im/hydrogen-web.git
```
If you go into the `src` directory, you should see a `main.ts` file. If you put this code in there, you should see a basic timeline after login and initial sync have finished.
```ts
import {
Platform,
SessionContainer,
LoadStatus,
createNavigation,
createRouter,
RoomViewModel,
TimelineView
} from "hydrogen-web";
import {olmPaths, downloadSandboxPath} from "hydrogen-web/src/sdk/paths/vite";
const app = document.querySelector<HTMLDivElement>('#app')!
// bootstrap a session container
const platform = new Platform(app, {
downloadSandbox: downloadSandboxPath,
olm: olmPaths,
}, null, { development: true });
const navigation = createNavigation();
platform.setNavigation(navigation);
const urlRouter = createRouter({
navigation: navigation,
history: platform.history
});
urlRouter.attach();
const sessionContainer = new SessionContainer({
platform,
olmPromise: platform.loadOlm(),
workerPromise: platform.loadOlmWorker()
});
// wait for login and first sync to finish
const loginOptions = await sessionContainer.queryLogin("matrix.org").result;
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sessionContainer.startWithLogin(loginOptions.password("user", "password"));
await sessionContainer.loadStatus.waitFor((status: string) => {
return status === LoadStatus.Ready ||
status === LoadStatus.Error ||
status === LoadStatus.LoginFailed;
}).promise;
// check the result
if (sessionContainer.loginFailure) {
alert("login failed: " + sessionContainer.loginFailure);
} else if (sessionContainer.loadError) {
alert("load failed: " + sessionContainer.loadError.message);
} else {
// we're logged in, we can access the room now
const {session} = sessionContainer;
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// room id for #element-dev:matrix.org
const room = session.rooms.get("!bEWtlqtDwCLFIAKAcv:matrix.org");
const vm = new RoomViewModel({
room,
ownUserId: session.userId,
platform,
urlCreator: urlRouter,
navigation,
});
await vm.load();
const view = new TimelineView(vm.timelineViewModel);
app.appendChild(view.mount());
}
```