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Make sure the CSS class is-dark-theme is added to the editor iframe body #60300

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merged 1 commit into from
Apr 2, 2024
+16 −6
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Make sure the CSS class is-dark-theme is added to the editor iframe body #60300

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22 changes: 16 additions & 6 deletions packages/block-editor/src/components/iframe/index.js
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Original file line number Diff line number Diff line change
Expand Up @@ -141,6 +141,13 @@ function Iframe( {
function onLoad() {
const { contentDocument, ownerDocument } = node;
const { documentElement } = contentDocument;
// Get any CSS classes the iframe document body may initially have
// to re-apply them later together with the ones of the main document
// body. This is necessary for some CSS classes for example the
// `is-dark-theme` class added by useDarkThemeBodyClassName.
const initialIframeBodyClasses = Array.from(
contentDocument.body.classList
);
iFrameDocument = contentDocument;

documentElement.classList.add( 'block-editor-iframe__html' );
Expand All @@ -151,12 +158,15 @@ function Iframe( {
// be added in the editor too, which we'll somehow have to get from
// the server in the future (which will run the PHP filters).
setBodyClasses(
Array.from( ownerDocument.body.classList ).filter(
( name ) =>
name.startsWith( 'admin-color-' ) ||
name.startsWith( 'post-type-' ) ||
name === 'wp-embed-responsive'
)
Array.from( ownerDocument.body.classList )
.concat( initialIframeBodyClasses )
.filter(
( name ) =>
name.startsWith( 'admin-color-' ) ||
name.startsWith( 'post-type-' ) ||
name === 'wp-embed-responsive' ||
name === 'is-dark-theme'
)
);

contentDocument.dir = ownerDocument.dir;
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