@wordpress/block-library/build-module/utils/migrate-font-family.js

Block library for the WordPress editor.

/**
 * WordPress dependencies
 */
import { privateApis as blockEditorPrivateApis } from '@wordpress/block-editor';

/**
 * Internal dependencies
 */
import { unlock } from '../lock-unlock';
const {
  cleanEmptyObject
} = unlock(blockEditorPrivateApis);

/**
 * Migrates the current style.typography.fontFamily attribute,
 * whose value was "var:preset|font-family|helvetica-arial",
 * to the style.fontFamily attribute, whose value will be "helvetica-arial".
 *
 * @param {Object} attributes The current attributes
 * @return {Object} The updated attributes.
 */
export default function (attributes) {
  if (!attributes?.style?.typography?.fontFamily) {
    return attributes;
  }
  const {
    fontFamily,
    ...typography
  } = attributes.style.typography;
  return {
    ...attributes,
    style: cleanEmptyObject({
      ...attributes.style,
      typography
    }),
    fontFamily: fontFamily.split('|').pop()
  };
}
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