@wordpress/block-editor/build-module/utils/dom.js

Generic block editor.

/**
 * Returns true if two elements are contained within the same block.
 *
 * @param {Element} a First element.
 * @param {Element} b Second element.
 *
 * @return {boolean} Whether elements are in the same block.
 */
export function isInSameBlock(a, b) {
  return a.closest('.block-editor-block-list__block') === b.closest('.block-editor-block-list__block');
}
/**
 * Returns true if an element is considered part of the block and not its
 * children.
 *
 * @param {Element} blockElement Block container element.
 * @param {Element} element      Element.
 *
 * @return {boolean} Whether element is in the block Element but not its
 *                   children.
 */

export function isInsideRootBlock(blockElement, element) {
  const parentBlock = element.closest('.block-editor-block-list__block');
  return parentBlock === blockElement;
}
/**
 * Finds the block client ID given any DOM node inside the block.
 *
 * @param {Node?} node DOM node.
 *
 * @return {string|undefined} Client ID or undefined if the node is not part of
 *                            a block.
 */

export function getBlockClientId(node) {
  while (node && node.nodeType !== node.ELEMENT_NODE) {
    node = node.parentNode;
  }

  if (!node) {
    return;
  }

  const elementNode =
  /** @type {Element} */
  node;
  const blockNode = elementNode.closest('.block-editor-block-list__block');

  if (!blockNode) {
    return;
  }

  return blockNode.id.slice('block-'.length);
}
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