Core: Drop support for Edge Legacy (i.e. non-Chromium Microsoft Edge)#4792
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mgol merged 1 commit intojquery:masterfrom Sep 22, 2020
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Core: Drop support for Edge Legacy (i.e. non-Chromium Microsoft Edge)#4792mgol merged 1 commit intojquery:masterfrom
mgol merged 1 commit intojquery:masterfrom
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mgol
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Sep 21, 2020
| urlAnchor = document.createElement( "a" ); | ||
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| // Support: IE <=8 - 11+, Edge 12 - 17 only | ||
| // Support: IE <=8 - 11+ |
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I removed mentions of Edge from support comments as well. Among other things, this is because many IE workarounds are now hidden behind an isIE check so a support comment mentioning Edge would be confusing as Edge wouldn't execute that code.
IE is quite special here as that's the only browser which we detect as a browser to work around its bugs instead of running support tests.
This was referenced Sep 21, 2020
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Travis fails because tests on Firefox ESR are run on version 68 at the moment. That version doesn't support the |
mgol
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Sep 21, 2020
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| return jQuery.contains( elem.ownerDocument, elem ) || | ||
| elem.getRootNode( composed ) === elem.ownerDocument; |
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Reorganizing the definitions decreased the gzipped size a bit.
timmywil
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Sep 21, 2020
timmywil
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Sep 21, 2020
Also, restrict some workarounds that were applied unconditionally in all browsers to run only in IE now. This slightly increases the size but reduces the performance burden on modern browsers that don't need the workarounds. Also, clean up some comments & remove some obsolete workarounds. Fixes jquerygh-4568
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Both IE & Edge Legacy need the workaround of calling `setDocument()` in an `unload` handler to avoid "permission denied" errors. However, due to not being possible to feature-detect this issue, the handler has been applied in all browsers for windows different than the one in which jQuery was loaded. jQuery 4.0, which drops Edge Legacy support, guards this workaround with a `document.documentMode` check. This won't work in the 3.x line due to still supporting Edge Legacy but we can check for `document.documentElement.msMatchesSelector` instead as that API is supported in IE 9+ and all Edge Legacy versions. Fixes jquerygh-5281 Ref jquerygh-4792
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Both IE & Edge Legacy need the workaround of calling `setDocument()` in an `unload` handler to avoid "permission denied" errors. However, due to not being possible to feature-detect this issue, the handler has been applied in all browsers for windows different than the one in which jQuery was loaded. jQuery 4.0, which drops Edge Legacy support, guards this workaround with a `document.documentMode` check. This won't work in the 3.x line due to still supporting Edge Legacy but we can check for `document.documentElement.msMatchesSelector` instead as that API is supported in IE 9+ and all Edge Legacy versions. Fixes gh-5281 Closes gh-5282 Ref gh-4792
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Summary
Drop support for EdgeHTML (i.e. non-Chromium Microsoft Edge).
Also, restrict some workarounds that were applied unconditionally in all
browsers to run only in IE now. This slightly increases the size but reduces
the performance burden on modern browsers that don't need the workarounds.
Also, clean up some comments & remove some obsolete workarounds.
Fixes gh-4568
-255 bytes 🎉
Checklist
New tests have been added to show the fix or feature worksIf needed, a docs issue/PR was created at https://github.com/jquery/api.jquery.com