position: sticky is a new way to position elements and is conceptually similar to position: fixed. The difference is that a stickily positioned element behaves like position: relative within its parent, until a given offset threshold is met.4,580 votes
position: sticky shipped in Microsoft Edge included in Windows Insider Preview build 16215.
The DOM Standard defines a 'once' option for addEventListener() which causes the callback to only be called once, upon the next occurrence of the given event type, after which the listener gets automatically removed:
The effect is similar to jQuery's popular $.one() method.143 votes
‘once’ shipped in Microsoft Edge included in Windows Insider Preview build 16215.
Update the IE implementation of Grid Layout to match the current spec. The current implementation from the IE 10 days is outdated.7,575 votes
CSS Grid Layout just shipped behind a flag (about:flags → “Enable Unprefixed CSS Grid Layout”) in Windows 10 Insider Preview build 16226.
CSS properties that control the position and size of replaced content within the content box.4,152 votes
object-fit/object-position shipped in Microsoft Edge included in Windows Insider Preview build 16215.
ES6 Module supprt2,793 votes
Ogg Vorbis and Opus are free and open-source audio codecs with great quality. They are developed by Xiph.Org Foundation and IETF.
Opus codec provides the best quality (latest listening tests: http://listening-test.coresv.net/results.htm for 96 kbps and http://listening-tests.hydrogenaud.io/igorc/results.html for 64 kbps) and very low latency (http://opus-codec.com/comparison/ ). More information: http://en.wikipedia.org/wiki/Opus_%28audio_format%29 . Support status: http://caniuse.com/#search=opus .
Ogg Vorbis also provides good quality. It is an old audio format and you can find many of Ogg Vorbis files in the web. Ogg Vorbis is very popular in the Linux world. More information: http://en.wikipedia.org/wiki/Vorbis and http://vorbis.com/ . Support status: http://caniuse.com/#search=ogg .6,020 votes
Opus is now in preview builds behind a flag. Please see https://blogs.windows.com/msedgedev/2016/04/18/webm-vp9-and-opus-support-in-microsoft-edge/
In line with webgl support, be ahead if the curve in supporting the emerging web assembly standard.
Be ahead of the curve or at least on par with Mozilla, to be first or joint first in supporting this exciting new capability (even in beta or early release testing)
Don't make us wait!!229 votes
Enables atomic operations on shared memory locations. Allows for the role of "threads" to be played by Web Workers in web browser environments.
- Support for threaded code in programs written in other languages that are translated to asm.js or plain JS or a combination of the two, notably C++ but also JVM and CIL bytecode, Halide, Clojure, Rust, and similar safe languages.
- Support for hand-written JS or JS+asm.js that makes use of multiprocessing facilities for select tasks, such as image processing, asset management, or game AI.83 votes
Shared Memory and Atomics is enabled by default in Microsoft Edge included in Windows Insider Preview build 16215.
This feature would add the ability to set the focus and active pseudo states from the DOM Explorer pseudo state checkboxes.
- New checkboxes on the pseudo state toggles
- Force on only no force off (off toggle state will follow browser default)74 votes
Emulating :active / : focus / :hover / :visited are all now supported in the Edge Developer Tools. Try this out in the latest Windows Insider Preview builds!
Implement Single Instruction Multiple Data (SIMD) in Internet Explorer.350 votes
SIMD.js in included in Chakra behind a flag in Windows Insider Preview Build 10240+.
Add support for SharedArrayBuffer :
SharedArrayBuffer is included behind the experimental JS flag in Edge 15, included in Windows 10 Creators Update.
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