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Summary
Fixes #3393
Added a caching layer and some other logic to avoid fading in icons when they are immediately renderable.
euiIcon-isLoaded
class when an icon is immediately renderable, removing the fade-in animation on cached icons or when a custom component is providedThe various update paths for the icon's state is definitely a mess. Everything's working, rendering, and snapshotting as expected but the next time the maze is touched it should be documented & refactored.
Checklist
- [ ] Check against all themes for compatibility in both light and dark modes- [ ] Checked in mobile- [ ] Checked in IE11 and Firefox- [ ] Props have proper autodocs- [ ] Added documentation examples- [ ] Checked for accessibility including keyboard-only and screenreader modes