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60 lines
1.3 KiB
TypeScript
60 lines
1.3 KiB
TypeScript
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const makeSandboxedIframe = (
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bodyHtml: string,
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scripts: string[],
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) => {
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const iframe = document.createElement('iframe');
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// allow-modals: Allows confirm/alert dialogs.
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iframe.setAttribute('sandbox', 'allow-scripts allow-modals');
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iframe.addEventListener('load', async () => {
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iframe.contentWindow.postMessage({
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kind: 'add-script',
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scripts,
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}, '*');
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}, { once: true });
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iframe.srcdoc = `
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<!DOCTYPE html>
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<html>
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<head></head>
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<body>
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<script>
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"use strict";
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window.onmessage = (event) => {
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console.log('got message', event);
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if (event.source !== parent) {
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console.log('Ignoring message: wrong source');
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return;
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}
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if (event.data.kind !== 'add-script') {
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console.log('Ignoring message: wrong type', event.data.kind);
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return;
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}
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console.log('Adding plugin scripts...');
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window.onmessage = undefined;
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for (const scriptText of event.data.scripts) {
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const scriptElem = document.createElement('script');
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scriptElem.appendChild(document.createTextNode(scriptText));
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document.head.appendChild(scriptElem);
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}
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};
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</script>
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${bodyHtml}
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</body>
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</html>
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`;
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return {
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iframe,
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loadPromise: new Promise<void>(resolve => {
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iframe.addEventListener('load', () => resolve(), { once: true });
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}),
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};
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};
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export default makeSandboxedIframe;
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