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67 lines
1.5 KiB
TypeScript
67 lines
1.5 KiB
TypeScript
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interface Options {
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bodyHtml: string;
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headHtml: string;
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scripts: string[];
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permissions?: string;
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allow?: string;
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}
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// allow-modals: Allows confirm/alert dialogs.
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const makeSandboxedIframe = ({ bodyHtml, headHtml, scripts, permissions = 'allow-scripts allow-modals', allow = '' }: Options) => {
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const iframe = document.createElement('iframe');
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iframe.setAttribute('sandbox', permissions);
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if (allow) {
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iframe.allow = allow;
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}
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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>${headHtml}</head>
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<body>
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<script>
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"use strict";
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window.onmessage = (event) => {
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if (event.source !== parent) {
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console.log('Ignoring message: wrong source');
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return;
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}
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if (event.data.kind !== 'add-script') {
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console.log('Ignoring message: wrong type', event.data.kind);
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return;
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}
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console.log('Adding scripts...');
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window.onmessage = undefined;
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for (const scriptText of event.data.scripts) {
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const scriptElem = document.createElement('script');
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scriptElem.appendChild(document.createTextNode(scriptText));
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document.head.appendChild(scriptElem);
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}
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};
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</script>
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${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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