@wordpress/block-library/build-module/heading/edit.js

import { createElement } from "@wordpress/element";

/**
 * Internal dependencies
 */
import HeadingToolbar from './heading-toolbar';
/**
 * WordPress dependencies
 */

import { __ } from '@wordpress/i18n';
import { Fragment } from '@wordpress/element';
import { PanelBody } from '@wordpress/components';
import { createBlock } from '@wordpress/blocks';
import { RichText, BlockControls, InspectorControls, AlignmentToolbar } from '@wordpress/block-editor';
export default function HeadingEdit(_ref) {
  var attributes = _ref.attributes,
      setAttributes = _ref.setAttributes,
      mergeBlocks = _ref.mergeBlocks,
      insertBlocksAfter = _ref.insertBlocksAfter,
      onReplace = _ref.onReplace,
      className = _ref.className;
  var align = attributes.align,
      content = attributes.content,
      level = attributes.level,
      placeholder = attributes.placeholder;
  var tagName = 'h' + level;
  return createElement(Fragment, null, createElement(BlockControls, null, createElement(HeadingToolbar, {
    minLevel: 2,
    maxLevel: 5,
    selectedLevel: level,
    onChange: function onChange(newLevel) {
      return setAttributes({
        level: newLevel
      });
    }
  })), createElement(InspectorControls, null, createElement(PanelBody, {
    title: __('Heading Settings')
  }, createElement("p", null, __('Level')), createElement(HeadingToolbar, {
    minLevel: 1,
    maxLevel: 7,
    selectedLevel: level,
    onChange: function onChange(newLevel) {
      return setAttributes({
        level: newLevel
      });
    }
  }), createElement("p", null, __('Text Alignment')), createElement(AlignmentToolbar, {
    value: align,
    onChange: function onChange(nextAlign) {
      setAttributes({
        align: nextAlign
      });
    }
  }))), createElement(RichText, {
    identifier: "content",
    wrapperClassName: "wp-block-heading",
    tagName: tagName,
    value: content,
    onChange: function onChange(value) {
      return setAttributes({
        content: value
      });
    },
    onMerge: mergeBlocks,
    unstableOnSplit: insertBlocksAfter ? function (before, after) {
      setAttributes({
        content: before
      });

      for (var _len = arguments.length, blocks = new Array(_len > 2 ? _len - 2 : 0), _key = 2; _key < _len; _key++) {
        blocks[_key - 2] = arguments[_key];
      }

      insertBlocksAfter([].concat(blocks, [createBlock('core/paragraph', {
        content: after
      })]));
    } : undefined,
    onRemove: function onRemove() {
      return onReplace([]);
    },
    style: {
      textAlign: align
    },
    className: className,
    placeholder: placeholder || __('Write heading…')
  }));
}
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