Block the use of outdated APIs like synchronous XHR and document.write().Allow iframes to use the fullscreen API.Restrict a site from using sensitive APIs like camera or microphone.Change the default behavior of autoplay on mobile and third party videos.Here are examples of things you can do with Feature Policy: These policies restrict what APIs the site can access or modify the browser's default behavior for certain features. With Feature Policy, you opt-in to a set of "policies" for the browser to enforce on specific features used throughout your site. That Great Experience ™ you once achieved may begin to deteriorate and UX starts to suffer! Feature Policy is designed to keep you on track. As your project evolves, developers come on board, new features land, and the codebase grows.
It's even harder to keep that experience great over time. It's hard enough to build a top-notch web app that nails performance and uses all the latest best practices. # Introductionīuilding for the web is a rocky adventure. The feature policies themselves are little opt-in agreements between developer and browser that can help foster our goals of building (and maintaining) high quality web apps. It's like CSP but instead of controlling security, it controls features! # Summaryįeature Policy allows web developers to selectively enable, disable, and modify the behavior of certain APIs and web features in the browser. You should ensure you have migrated your Feature-Policy headers to align with this change. The Feature Policy was renamed to the Permissions Policy on May 26, 2020.
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