axe-core/lib/core/public/setup.js

Accessibility engine for automated Web UI testing

import { getFlattenedTree, getSelectorData } from '../utils';

/**
 * Setup axe-core so axe.common functions can work properly.
 * @param {Node} [node=document.documentElement] optional node. NOTE: passing in anything other than body or the documentElement may result in incomplete results.
 */
function setup(node) {
  if (axe._tree) {
    throw new Error(
      'Axe is already setup. Call `axe.teardown()` before calling `axe.setup` again.'
    );
  }

  axe._tree = getFlattenedTree(node);
  axe._selectorData = getSelectorData(axe._tree);

  return axe._tree[0];
}

export default setup;