--- title: Safari Technology Preview 11 Release Notes framework: safari-technology-preview-release-notes role: article role_heading: Article path: safari-technology-preview-release-notes/stp-release-11 --- # Safari Technology Preview 11 Release Notes Preview the latest web technology updates including: JavaScript, Web APIs, ApplePay, Web Inspector, MathML, CSS, Rendering, Media, Accessibility, and Content Blockers. ## Overview Overview Safari Technology Preview Release 11 is now available for download for both macOS Sierra betas and OS X El Capitan. If you already have Safari Technology Preview installed, you can update from the Mac App Store’s Updates tab. This release covers WebKit revisions 203771–204289. JavaScript Updated behavior for a class that extends null to follow ECMAScript 2016 specifications (r204058) Made the second argument for Function.prototype.apply allow null, undefined or array-like data (r203790) Web APIs Add support for DOMTokenList.replace() (r204161) Add support for Element.getAttributeNames() (r203852) Made the first parameter mandatory for canvas.getContext() and probablySupportsContext() (r203845) Made the first two parameters madatory for window.postMessage() (r203846) Made the first parameter mandatory for Document.execCommand() and queryCommand*() (r203784) Made the first parameter mandatory for HTMLMediaElement.canPlayType() (r203806) Made the first parameter mandatory for indexed property getters (r203788) Made the first parameter mandatory for Range.createContextualFragment() (r203796) Made the first parameter mandatory for setTimeout() and setInterval() (r203805) Made the first parameter mandatory for SVGDocument.createEvent() (r203821) Made the parameter mandatory for a named property getter (r203797) Made the parameter mandatory for table.deleteRow() and body.deleteRow() (r203840) Made the parameter mandatory for tr.deleteCell() (r203833) Made the parameters mandatory for CanvasGradient.addColorStop() (r203820) Made the parameters mandatory for DOMParser.parseFromString() (r203800) Made the parameters mandatory for Event.initEvent() (r203848) Made the parameters mandatory for insertAdjacentText() and insertAdjacentHTML() (r203803) Enabled strict type checking for nullable attribute setters for wrapper types (r203949) Enabled strict type checking for operations’ nullable parameters for wrapper types (r203941) ApplePay Stopped accepting the deprecated requiredShippingAddressFields and requiredBillingAddressFields properties (r203789) Web Inspector Improved the appearance of the Timeline tab when editing the enabled timelines (r204125) Changed the Jump to Line keyboard shortcut to Control-G (⌃G) (r204099) Fixed the grid column resizing element positions (r203991) Added waterfall view to the Network tab and Network Timeline (r203843) Fixed positioning of popovers when the window resizes (r204264) Fixed popover drawing (r204136) Polished UI for the Edit Breakpoint, Open Quickly, and Goto Line dialogs (r204152, r204124) Update the Visual Styles Sidebar to use a one column layout when narrow (r203807) Fixed the behavior of Home and End keys to match system behavior (r203804) MathML Polished MathML parsing (r204038, r204037, r203896) CSS Aligned the CSS supports rule with the specification (r203782) Addressed incorrect results for the color-gamut media query (r203903) Rendering Fixed performance issues with with the truespeed attribute (r204197) Media Fixed captions not rendering in the PiP window for a hidden video element (r203799) Addressed media controls not displaying for some autoplaying videos at certain browser dimensions (r203928) Fixed media stream video element to show black when all video tracks disabled (r203826) Accessibility Added localizable strings when inserting list types (r203801) Improved the accessibility of media controls (r203913) Content Blockers Enabled Content Blockers to block WebSocket connections (r204127) ## See Also ### 2016 - [Safari Technology Preview 20 Release Notes](safari-technology-preview-release-notes/stp-release-20.md) - [Safari Technology Preview 19 Release Notes](safari-technology-preview-release-notes/stp-release-19.md) - [Safari Technology Preview 18 Release Notes](safari-technology-preview-release-notes/stp-release-18.md) - [Safari Technology Preview 17 Release Notes](safari-technology-preview-release-notes/stp-release-17.md) - [Safari Technology Preview 16 Release Notes](safari-technology-preview-release-notes/stp-release-16.md) - [Safari Technology Preview 15 Release Notes](safari-technology-preview-release-notes/stp-release-15.md) - [Safari Technology Preview 14 Release Notes](safari-technology-preview-release-notes/stp-release-14.md) - [Safari Technology Preview 13 Release Notes](safari-technology-preview-release-notes/stp-release-13.md) - [Safari Technology Preview 12 Release Notes](safari-technology-preview-release-notes/stp-release-12.md) - [Safari Technology Preview 10 Release Notes](safari-technology-preview-release-notes/stp-release-10.md) - [Safari Technology Preview 9 Release Notes](safari-technology-preview-release-notes/stp-release-9.md) - [Safari Technology Preview 8 Release Notes](safari-technology-preview-release-notes/stp-release-8.md) - [Safari Technology Preview 7 Release Notes](safari-technology-preview-release-notes/stp-release-7.md) - [Safari Technology Preview 6 Release Notes](safari-technology-preview-release-notes/stp-release-6.md) - [Safari Technology Preview 5 Release Notes](safari-technology-preview-release-notes/stp-release-5.md)