// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

/**
 * @param {Node} el A node to search for ancestors with |className|.
 * @param {string} className A class to search for.
 * @return {Element} A node with class of |className| or null if none is found.
 */
export function findAncestorByClass(el, className) {
  while (el !== null) {
    if (el.classList && el.classList.contains(className)) {
      break;
    }
    el = el.parentNode;
  }
  return el;
}