Polyfill edge because its position:sticky is buggy #119
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MS Edge (Pre-Chromium) has a buggy implementation of
position: sticky
where it flickers when the user scrolls the page.See: https://stackoverflow.com/questions/52876032/position-sticky-flickers-during-scroll-in-microsoft-edge-but-not-in-other-brow
And WordPress/gutenberg#12241
position: fixed
does not have this issue.I was able to fix this bug on my website by adding this polyfill library and modifying it to not seppuku for Edge, hope it helps others too.