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Apple Releases Safari Technology Preview 33 for macOS Sierra and High Sierra [Download]
Apple has released Safari Technology Preview 33 for macOS Sierra and macOS High Sierra. Safari Technology Preview offers a sneak peek at upcoming web technologies in macOS and iOS. Here are the release notes: Performance ● Fixed an issue that could lead to large memory use in the Safari Technology Preview and web content processes when certain Safari Extensions are installed JavaScript ● Fixed for-in optimization static analysis in the bytecode generator ● Improved performance of String.prototype.concat ● Improved the bytecode and type information provided for toLength ● Optimized Map and Set constructors WebRTC ● Added WebRTC stats logging Media Streams and Capture ● Fixed getUserMedia prompting too often ● Prevented getUserMedia requests from background tabs unless the tab is already capturing ● Prevented getUserMedia from prompting again if the user denied access Media ● Enabled clients to specify a list of codecs that should require hardware decode support ● Exempted exclusively wall-powered devices from client-required hardware codec support ● Aligned Web Audio implementation to specifications when clients pass a value of 0 for bufferSize to the createScriptProcessor() method CSS Grid ● Added support for orthogonally positioned grid items ● Fixed the behavior of positioned items without specific dimensions ● Fixed the logical margin applied in the tracks sizing algorithm of auto tracks ● Fixed margin applied when stretching an orthogonal item in a fixed size track Web API ● Aligned and limits with the latest HTML specification ● Fixed null content-type and content-length when fetching Blob URLs with XHR ● Fixed getComputedStyle() to return pixel values for left, right, top, and bottom, matching the specifications ● Implemented fromFloat32Array, fromFloat64Array, toFloat32Array, and toFloat64Array for DOMMatrix ● Implemented DOMPointReadOnly.matrixTransform() ● Enabled script modules to be imported via data URLs ● Updated to slightly stricter rules for custom element names from the recent draft standards ● Used the parent box style to adjust RenderStyle for alignment ● Added conditional support for media preloading and aligned media as values ● Aligned preload implementation to specifications with mandatory as value and other alignments Rendering ● Changed behavior to remove backing store for layers that are outside the viewport ● Fixed an issue where a frame's composited content is visible when the frame has visibility:hidden ● Changed behavior to destroy the associated renderer subtree when display:contents node is deleted Web Inspector ● Added contextual menu item to log a WebSocket object to the console ● Added Debug view to the Settings tab for debug settings and experimental features ● Added the ability for the user to choose stylesheet when creating new rules ● Changed the Node Details Sidebar to allow editable key and values in the Attributes table ● Prevented unnecessary layout triggered when a Sidebar is resized while collapsed ● Fixed performing search on reload for an existing query in the Search tab ● Fixed images dragged from Web Inspector to Desktop being named “Unknown.png” ● Fixed an issue where reloading the page after switching from the Resource tab switches back ● Fixed the CodeMirror instance in the ConsolePrompt getting refreshed each time it is shown ● Fixed showing active Web Sockets when opening Web Inspector ● Fixed an issue preventing the go-to arrow to inspect Web Sockets that receive >50 messages per second ● Improved the reliability of automatically pausing in auto-attach when inspecting a JSContext Bug Fixes ● Enabled AirPods to work with Netflix ● Fixed stuttering audio in YouTube when the page changes visibility
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