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Performance: avoid calling postcss when not needed #56601

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Nov 29, 2023
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Performance: avoid calling postcss when not needed #56601

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8 changes: 8 additions & 0 deletions packages/block-editor/src/utils/transform-styles/index.js
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Original file line number Diff line number Diff line change
Expand Up @@ -19,6 +19,14 @@ import rebaseUrl from 'postcss-urlrebase';
*/
const transformStyles = ( styles, wrapperSelector = '' ) => {
return styles.map( ( { css, ignoredSelectors = [], baseURL } ) => {
// When there is no wrapper selector or base URL, there is no need
// to transform the CSS. This is most cases because in the default
// iframed editor, no wrapping is needed, and not many styles
// provide a base URL.
if ( ! wrapperSelector && ! baseURL ) {
return css;
}

try {
return postcss(
[
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