Created
March 13, 2026 09:29
-
-
Save ravicious/207d09c1755594dd45abe2a6b7f961ee to your computer and use it in GitHub Desktop.
cross-origin isolation Chromium repo
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="UTF-8"> | |
| <title>Cross-Origin Isolation Repro</title> | |
| <style> | |
| body { font-family: monospace; padding: 2em; } | |
| .pass { color: green; } | |
| .fail { color: red; } | |
| </style> | |
| </head> | |
| <body> | |
| <h1>Cross-Origin Isolation Check</h1> | |
| <p>crossOriginIsolated: <span id="coi"></span></p> | |
| <p>SharedArrayBuffer: <span id="sab"></span></p> | |
| <h2>Response Headers</h2> | |
| <pre id="headers"></pre> | |
| <script> | |
| const coi = document.getElementById('coi'); | |
| coi.textContent = window.crossOriginIsolated; | |
| coi.className = window.crossOriginIsolated ? 'pass' : 'fail'; | |
| const sab = document.getElementById('sab'); | |
| try { | |
| new SharedArrayBuffer(1); | |
| sab.textContent = 'available'; | |
| sab.className = 'pass'; | |
| } catch (e) { | |
| sab.textContent = 'unavailable (' + e.message + ')'; | |
| sab.className = 'fail'; | |
| } | |
| fetch(location.href).then(r => { | |
| const relevant = ['cross-origin-opener-policy', 'cross-origin-embedder-policy']; | |
| const lines = [...r.headers.entries()] | |
| .filter(([k]) => relevant.includes(k)) | |
| .map(([k, v]) => k + ': ' + v); | |
| document.getElementById('headers').textContent = lines.join('\n') || '(none)'; | |
| }); | |
| </script> | |
| </body> | |
| </html> |
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| // Usage: node server.js | |
| const http = require('node:http'); | |
| const fs = require('node:fs'); | |
| const path = require('node:path'); | |
| const server = http.createServer((req, res) => { | |
| // Set cross-origin isolation headers on every response. | |
| res.setHeader('Cross-Origin-Opener-Policy', 'same-origin'); | |
| res.setHeader('Cross-Origin-Embedder-Policy', 'require-corp'); | |
| const filePath = path.join(__dirname, req.url === '/' ? 'index.html' : req.url); | |
| const ext = path.extname(filePath); | |
| const mimeTypes = { '.html': 'text/html', '.js': 'application/javascript', '.css': 'text/css' }; | |
| fs.readFile(filePath, (err, data) => { | |
| if (err) { | |
| res.writeHead(404); | |
| res.end('Not found'); | |
| return; | |
| } | |
| res.setHeader('Content-Type', mimeTypes[ext] || 'application/octet-stream'); | |
| res.writeHead(200); | |
| res.end(data); | |
| }); | |
| }); | |
| server.listen(3000, () => { | |
| console.log('http://localhost:3000'); | |
| }); |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment