Tag: cross-origin isolation

A practical, myth-busting guide to Cross-Origin-Opener-Policy (COOP) and Cross-Origin-Embedder-Policy (COEP): what they do, why teams argue about them, how to adopt them without breaking your site, and when they actually matter.

Learn how Cross-Origin-Opener-Policy (COOP) and Cross-Origin-Embedder-Policy (COEP) work, why they matter for modern web security and powerful browser features, and how to implement them safely-step by step with examples, nginx/Express/Apache snippets, and a migration checklist.