mastodon-glitch/app/javascript/entrypoints/embed.tsx

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import './public-path';
import { createRoot } from 'react-dom/client';
import { afterInitialRender } from 'mastodon/../hooks/useRenderSignal';
import { start } from '../mastodon/common';
import { Status } from '../mastodon/features/standalone/status';
import { loadPolyfills } from '../mastodon/polyfills';
import ready from '../mastodon/ready';
start();
function loaded() {
const mountNode = document.getElementById('mastodon-status');
if (mountNode) {
const attr = mountNode.getAttribute('data-props');
if (!attr) return;
const props = JSON.parse(attr) as { id: string; locale: string };
const root = createRoot(mountNode);
root.render(<Status {...props} />);
}
}
function main() {
ready(loaded).catch((error: unknown) => {
console.error(error);
});
}
loadPolyfills()
.then(main)
.catch((error: unknown) => {
console.error(error);
});
interface SetHeightMessage {
type: 'setHeight';
id: string;
height: number;
}
function isSetHeightMessage(data: unknown): data is SetHeightMessage {
if (
data &&
typeof data === 'object' &&
'type' in data &&
data.type === 'setHeight'
)
return true;
else return false;
}
window.addEventListener('message', (e) => {
// eslint-disable-next-line @typescript-eslint/no-unnecessary-condition -- typings are not correct, it can be null in very rare cases
if (!e.data || !isSetHeightMessage(e.data) || !window.parent) return;
const data = e.data;
// We use a timeout to allow for the React page to render before calculating the height
afterInitialRender(() => {
window.parent.postMessage(
{
type: 'setHeight',
id: data.id,
height: document.getElementsByTagName('html')[0]?.scrollHeight,
},
'*',
);
});
});