axe-core/lib/checks/generic/has-descendant-evaluate.js

Accessibility engine for automated Web UI testing

import { querySelectorAllFilter } from '../../core/utils';
import { isVisible } from '../../commons/dom';

function hasDescendant(node, options, virtualNode) {
  if (!options || !options.selector || typeof options.selector !== 'string') {
    throw new TypeError(
      'has-descendant requires options.selector to be a string'
    );
  }

  const matchingElms = querySelectorAllFilter(
    virtualNode,
    options.selector,
    vNode => isVisible(vNode.actualNode, true)
  );
  this.relatedNodes(matchingElms.map(vNode => vNode.actualNode));
  return matchingElms.length > 0;
}

export default hasDescendant;