Improve support for Internet Explorer 11 with Windows High Contrast Mode #2290
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vanitabarrett
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Aug 20, 2021
Adds IE11 support to the previous Windows High Contrast Mode fixes in PR Internet Explorer 11 doesn't support the `forced-colors` media feature or the `forced-color-adjust` property, but it has equivalents in `-ms-high-contrast` and `-ms-high-contrast-adjust`. We can use those CSS features to extend fixes to high contrast mode that previously only worked on more modern browsers. Adds a tweak to changes in commit 7dcba7d, so that the highlight works in Internet Explorer 11 as well.
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This PR adds support for IE11 to the previous Windows High Contrast Mode fixes in PR #2264.
Internet Explorer 11 doesn't support the
forced-colorsmedia feature or theforced-color-adjustproperty, but it has equivalents in-ms-high-contrastand-ms-high-contrast-adjust. We can use those CSS features to extend fixes to high contrast mode that previously only worked on more modern browsers.There are a couple of other places in our codebase where we have fixes for forced color mode (see PRs #2186, #2237), but the problems they fix don't seem to be present in IE11 (I think because it doesn't have a readability backplate), so I left those lines alone.