@wordpress/block-library/build-module/group/transforms.js

Block library for the WordPress editor.

/**
 * WordPress dependencies
 */
import { createBlock } from '@wordpress/blocks';
const transforms = {
  from: [{
    type: 'block',
    isMultiBlock: true,
    blocks: ['*'],

    __experimentalConvert(blocks) {
      const alignments = ['wide', 'full']; // Determine the widest setting of all the blocks to be grouped

      const widestAlignment = blocks.reduce((accumulator, block) => {
        const {
          align
        } = block.attributes;
        return alignments.indexOf(align) > alignments.indexOf(accumulator) ? align : accumulator;
      }, undefined); // Clone the Blocks to be Grouped
      // Failing to create new block references causes the original blocks
      // to be replaced in the switchToBlockType call thereby meaning they
      // are removed both from their original location and within the
      // new group block.

      const groupInnerBlocks = blocks.map(block => {
        return createBlock(block.name, block.attributes, block.innerBlocks);
      });
      return createBlock('core/group', {
        align: widestAlignment,
        layout: {
          type: 'constrained'
        }
      }, groupInnerBlocks);
    }

  }],
  to: [{
    type: 'block',
    blocks: ['*'],
    transform: (attributes, innerBlocks) => innerBlocks
  }]
};
export default transforms;
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