Apple released Safari 13: added opt-in dark mode

Apple has released Safari 13 for iOS 13, macOS 10.15 (Catalina), macOS Mojave and macOS High Sierra. This version comes with optional dark mode support, FIDO2-compliant USB security key support, updated Intelligent Tracking Prevention, and more.

Changelog

General

New Features

• Added Desktop-class Browsing to Safari for iPad. Safari for iPad displays the same desktop websites as Safari for macOS, and provides the same capabilities. In addition it has more keyboard shortcuts, a download manager with background downloads, and support for top productivity websites.
• Added opt-in dark mode support for websites in Safari for iOS.
• Added support for aborting Fetch requests.

Authentication and Passwords

New Features

• Updated Safari to prompt the user to change weak passwords when signing into a website. Requesting a password change uses the well-known URL for changing passwords, enabling websites to specify the page to open for updating a password.
• Added support for FIDO2-compliant USB security keys with the Web Authentication standard in Safari on macOS.
• Added support for Sign in With Apple to Safari and to WKWebView.

Security and Privacy

New Features

• Added a permission API on iOS for DeviceMotionEvent and DeviceOrientationEvent.
• Changed the behavior for third party iframes to prevent them automatically navigating the page.
• Updated Intelligent Tracking Prevention to prevent cross-site tracking through referrer and through link decoration.
• Improved the privacy of local WebRTC data connections with mDNS ICE candidates.
• Increased the security for WebKit sandboxes on iOS and macOS.

Layout and Rendering

New Features

• Added support for one-finger accelerated scrolling to all frames and overflow:scroll elements eliminating the need to set-webkit-overflow-scrolling: touch.
• Changed the default behavior on iPad for wide web pages with responsive meta-tags that require horizontal scrolling. Pages are scaled to prevent horizontal scrolling and any text is resized to preserve legibility.
• Added support for CSS conic gradients.

Performance

New Features

• Reduced the initial rendering time for webpages on iOS.
• Added automatic support for Fast Tap to desktop websites on iPad.
• Reduced load time up to 50% for webpages on watchOS.
• Reduced the amount of memory used by JavaScript, including for non-web clients.
• Improved the MotionMark graphics performance benchmark score by 10%.

Web API

New Features

• Added support for the __Secure- and __Host- cookie prefixes in beta 3.
• Improved iPad hardware keyboard support for websites including focus navigation and scrolling with the arrow keys.
• Added support for the Pointer Events API enabling consistent access to mouse, trackpad, touch, and Apple Pencil events.
• Added support for the Visual Viewport API for adjusting web content to avoid overlays, such as the onscreen keyboard.
• Added support for programmatic paste with user consent to Safari for iOS.
• Updated editing callouts to avoid in-page controls.
• Added intelligent whitespace to editable WebViews and editable areas of webpages.

Payment Request API

New Features

• Added support for Apple Pay on the Web to WKWebView. Note that using script injection APIs, such as WKUserScript or evaluateJavaScript(_:completionHandler:) disables Apple Pay for that view.

Media

New Features

• Added support for the decodingInfo() method of the Media Capabilities API for checking supported codecs, efficiently supported codecs, and optional codec features including alpha.
• Added the ability to Safari for macOS to share your screen with others using only web technologies. Plug-ins are no longer required.
• Updated Safari for iPad to support Media Source Extensions.
• Added support for the navigator.mediaDevices property of the Media Capture and Streams API to SFSafariViewController.

Resolved Issues

• Transparency in video with an alpha channel now works correctly for all supported video formats.

Safari App Extension API

New Features

• Added an API for page navigation notifications.
• Added support for associated Safari App Extensions receiving blocked content notifications from Content Blocker Safari Extensions.

Web Inspector and Tools

New Features

• Added Safari WebDriver to iOS.
• Added importing and exporting of recorded timeline data.
• Added the CPU Usage Timeline for analyzing and improving the power efficiency of websites.
• Added the Audit tab for running tests against web content including a built-in accessibility audit, importing and exporting results, and creating custom audits.
• Added the Changes sidebar in the Elements tab to track CSS changes in the Styles sidebar.
• Added the Device Settings menu to override developer-related Safari settings when Web Inspector is connected to an iOS device.
• Added a Security tab to the resources view of the Network tab to review certificates and TLS settings.
• Increased the performance of Web Inspector for large sites.

Removed Features

• Removed support for WebSQL.
• Removed support for Legacy Safari Extensions.
• Disabled -webkit-overflow-scrolling: touch on iPad. All frames and scrollable overflow areas now use accelerated one-finger scrolling without changing stacking.
• Disabled frame flattening on iOS. Frames now render in the same way as a desktop browser.

AuthenticationServices Framework

New Features

• Added ASAuthorizationController to implement Sign In with Apple and to use a system-provided sign-in account picker for accounts stored in iCloud Keychain.
• Added ASWebAuthenticationSession to the SDK for macOS.
• Added support for using web browsers other than Safari to ASWebAuthenticationSession on macOS. For more information, see ASWebAuthenticationSessionWebBrowserSessionManager.

WebKit Framework

New Features

• Added API to control desktop and mobile content modes.

JavaScriptCore Framework

New Features

• Added an API for loading ES6 modules.

LinkPresentation Framework

New Features

• Added LinkPresentation to the SDKs, enabling presentation of web links and better share sheet integration.

UIKit for Mac

Differences From iOS

• SFSafariViewController opens the URL in the user’s web browser and immediately calls safariViewControllerDidFinish(_:).

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