About half of the file's code was a back-compat polyfill of base64 functions for IE9.
Since WordPress no longer supports IE9 as of version 4.8, and all modern browsers come with these functions, the polyfills can be removed.
Follow-up to [26072], [26131], [26601], [47771].
Props TobiasBg, sabernhardt.
Fixes#61995.
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This includes many minor adjustments to a wide array of core files to replace shorthands with full declarations.
Follow-up to [50001], [50270], [50367].
Props Clorith, hellofromTonya, peterwilsoncc, adamsilverstein, aristath.
See #51812.
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These annotations make it clear to the reader of a JavaScript source
where the build process outputs to. These annotations can later be
integrated in a webpack configuration. This way there is one source of
truth.
The `build` folder is omitted from the paths, because a single JS file
shouldn't not be responsible of knowing where outputs in general will
end up at. A file only knows its output location relative to the
project.
Props adamsilverstein, herregroen, omarreiss, pento.
Fixes#44361.
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* wp.svgPainter and now moved to wp-admin.
* Restore !important background-image handling.
* Delay executing the IE9-specific base64 code if we don't need it.
* Make painted icons lose their color after hover at the same speed as dashicons (100ms).
props azaozz.
fixes#26333.
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