Framework: Pin fetch polyfill to 3.0 UMD distributable #9795
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This should be included in a 3.8 final release.
This pull request seeks to resolve an issue where the
fetch
polyfill is no longer usable in Internet Explorer 11. This was due to the fact that we had never pinned the version of polyfill we consume, thus when its latest 3.0.0 release included breaking changes to the default build targetting JavaScript modules, not supportable in IE11.The changes here target the IE-compatible UMD build, and also pin to the 3.0.0 version to avoid future issues.
Testing instructions:
Verify that saving works as expected in Internet Explorer and your preferred browser.
Based on our hashing of vendor scripts, I do not expect that an existing downloaded/cached copy should need to be deleted.