Safari

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#43 and others.

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Experimental WebKit Features Default Config Reference (Supposedly)

https://sixcolors.com/post/2021/07/apple-podcasts-reliability-problem-is-turning-into-an-image-problem/

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"Safari 15 Beta Release Notes | Apple Developer Documentation"

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Overview

Safari 15 ships with iOS and iPadOS 15 and macOS 12.

General

New Features in Safari 15 beta

• Redesigned the Safari user interface in macOS 12, iOS and iPadOS 15, along with adding Tab Groups and customization sync.

Authentication and Passwords

New Features in Safari 15 beta

• Added support for Verification Codes to the iCloud Keychain Password Manager. To use verification codes with Safari and Autofill:

  • Use autocomplete=one-time-code to make an <input> eligible for AutoFill.

  • Use a standard otpauth URL and replace the scheme with apple-otpauth to link directly to the password manager for setup.

  • Use a raster image to enable contextual menus on otpauth QR codes that offer to set up a verification code generator.

• Added technology preview of passkeys in iCloud Keychain:

  • Passkeys are WebAuth credentials intended to replace passwords for website and apps with device sync and backup.

  • To Enable the technology preview, in Safari choose Develop > Enable Syncing Platform Authenticator.

CSS

New Features in Safari 15 beta

• Added support for aspect-ratio for box elements.

• Added support for lab(), lch(), hwb() color syntaxes.

• Added support for predefined color spaces using the color() syntax: [srgb](https://drafts.csswg.org/css-color-4/#valdef-color-srgb), [display-p3](https://drafts.csswg.org/css-color-4/#valdef-color-display-p3), [a98-rgb](https://drafts.csswg.org/css-color-4/#valdef-color-a98-rgb), [prophoto-rgb](https://drafts.csswg.org/css-color-4/#valdef-color-prophoto-rgb), [rec2020](https://drafts.csswg.org/css-color-4/#valdef-color-rec2020), [xyz](https://drafts.csswg.org/css-color-4/#valdef-color-xyz).

• Adjusted environment variable calculations where appropriate to adjust for the safe area of the new iOS design.

HTML

New Features in Safari 15 beta

• Redesigned form controls in iOS.

• Added support for the theme-color meta tag to change the tab bar background and over-scroll area in macOS and iPadOS, and the status bar in iOS.

• Added support for the media attribute to specify theme-color meta tags for Dark Mode and light appearance.

  <meta name="theme-color" 
    content="#ecd96f" 
    media="(prefers-color-scheme: light)">
  

  JavaScript

  New Features in Safari 15 beta

  • Added top-level await.

  • Added support for ES6 Modules in Workers and ServiceWorkers.

  • Added support for Error.cause.

  • Added support for private class methods and accessors (Safari 14.1 added support for private data member syntax).

  • Added support for BigInt64Array and BigUint64Array.

  Media

  New Features in Safari 15 beta

  • Added support for the MediaSession API to enable SharePlay experiences.

  • Added Playback Speed and Chapters menus to built-in media controls.

  • Added hardware accelerated VP9 and WebM in MSE on all iPads that support iPadOS 15.

  • Added support for the Opus audio codec in WebM containers.

  Security & Privacy

  New Features in Safari 15 beta

  • Added support for automatic HTTPS upgrades.

  • Added IP address hiding from known trackers which users can enable in Safari Preferences.

  • Private Click Measurement enhancements for privacy-preserving ad click attribution:

    * Updated attribution reporting to also send reports to the click destination.
    
    * Added click fraud prevention with un-linkable tokens.
    
    * Added IP address protection for attribution reports.
    

  Payments

  New Features in Safari 15 beta

  • Added support for creating deferred or recurring payments.

  • Added support for indicating an estimated arrival date for shipping methods.

  • Added support for the user to enter a coupon code.

  • Added support for marking the shipping method as in-store pickup.

  WebAssembly

  New Features in Safari 15 beta

  • Added support for streaming compilation.

  • Added support for bulk memory operations.

  • Added support for reference types.

  • Added support for non-trapping conversions from float to int.

  Web APIs

  New Features in Safari 15 beta

  • Added support for WebGL 2. The implementation of WebGL runs on top of Metal for better performance.

  • Added support for Web Share level 2 enhancements to Web Share that enable sharing files from a web page to an app. See Web Share API for more information.

  • User gestures now propagate through requestAnimationFrame with a one second time limit.

  Web Extensions

  New Features in Safari 15 beta

  • Added support for Safari Web Extensions in iOS and iPadOS.

  • Added support for declarativeNetRequest in Safari Web Extensions.

  Web Inspector

  New Features in Safari 15 beta

  • Added an inspected page overlay for visualizing and debugging CSS grid contexts.

-"Safari 15 Beta Release Notes | Apple Developer Documentation"