Web Front-endCSS TutorialWeekly Platform News: Feature Policy, ECMAScript i18n API, Packaged PWAs
Šime regularly shares developer-focused content on webplatform.news.
Chrome's New Feature Policy API
Pete LePage introduces document.featurePolicy.allowedFeatures, a Chrome API listing all Feature Policy-controlled features enabled on a given page. This is invaluable for implementing and refining website feature policies.
Here's how to use it:
- Open your site in Chrome. Use the JavaScript console to run the API and see your site's allowed features.
- Consult featurepolicy.info to determine which features should be disabled (
'none') or restricted to same-origin iframes ('self'). - Add the
Feature-Policyheader to your HTTP responses (using semicolons to separate policies):
<code>Feature-Policy: geolocation 'self';sync-xhr 'none'</code>
- Re-run Step 1 (or use securityheaders.com) to verify your updated policy.
Other Web Development News
- Firefox's Enhanced Tracking Protection: Dave Camp reports Firefox now defaults to blocking cookies from known trackers in third-party contexts (new users only; existing users will see this update in the coming months).
-
Image Sharing on Chrome for Android: Pete LePage highlights Chrome for Android's new support for website image sharing (and other file types) via
navigator.share. See Web Platform News Issue 1014 and Ayooluwa Isaiah's recent post for details on the Web Share API. -
Broad Browser Support for Intl APIs: Valerie Young notes widespread browser support for ECMAScript Internationalization APIs for date/time (
Intl.DateTimeFormat) and number (Intl.NumberFormat) formatting. - Smooth AR Text Rendering: Alan Jeffrey discusses Mozilla's work (by Patrick Walton) on a vector graphics renderer for smooth text rendering at any angle in AR headsets, intended for Firefox Reality.
- Pinterest's Packaged PWA on Windows 10: Pinterest Engineering announces their progressive web app's availability as a standalone desktop application on Windows 10 via the Microsoft Store, gaining full access to Windows 10 APIs.
-
flow-rootin Safari Technology Preview: Jonathan Davis confirms Safari Technology Preview's adoption of theflow-rootvalue for the CSSdisplayproperty (already supported in Chrome and Firefox). See Web Platform News Issue 871 for examples.
The above is the detailed content of Weekly Platform News: Feature Policy, ECMAScript i18n API, Packaged PWAs. For more information, please follow other related articles on the PHP Chinese website!
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