[useEuiTheme] return a memoized object for performance #6165
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…nt, to help react optimize rendering performance
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Preview documentation changes for this PR: https://eui.elastic.co/pr_6165/ |
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Preview documentation changes for this PR: https://eui.elastic.co/pr_6165/ |
thompsongl
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Aug 24, 2022
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thompsongl
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LGTM after removing the console.log
Thanks, Chandler!
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| theme={{ | ||
| euiTheme, | ||
| colorMode, | ||
| modifications, | ||
| }} |
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Ah good catch that this creates a new object on every render 🙇♂️
Co-authored-by: Greg Thompson <[email protected]>
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Preview documentation changes for this PR: https://eui.elastic.co/pr_6165/ |
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Summary
Fixes #6159
Threw a console.log in EuiIcon's render and verified any time its owner component rendered, the icon would unexpectedly re-render as well. Narrowed it down to a different
themeprop coming in fromwithEuiThemeon every render, and traced object creation to bothuseEuiThemeandwithEuiTheme.withEuiThemeupdated to forwarduseEuiTheme's return value into the wrapped componentuseEuiThemeupdated with auseMemoto keep the resulting object stableChecklist
- [ ] Checked in both light and dark modes- [ ] Checked in mobile- [ ] Checked in Chrome, Safari, Edge, and Firefox- [ ] Props have proper autodocs and playground toggles- [ ] Added documentation- [ ] Checked Code Sandbox works for any docs examples- [ ] Checked for accessibility including keyboard-only and screenreader modes- [ ] Updated the Figma library counterpart