https://oasisinet.com/wp-content/themes/oasis-v2/_/js/get-focusable-elements.js

1/**
2 * Returns back a NodeList of focusable elements
3 * that exist within the passed parnt HTMLElement
4 *
5 * @param {HTMLElement} parent HTML element
6 * @returns {NodeList} The focusable elements that we can find
7 */
8export default (parent) => {
9  if (!parent) {
10    console.warn("You need to pass a parent HTMLElement");
11    return [];
12  }
13
14  return parent.querySelectorAll(
15    'button:not([disabled]), [href], input:not([disabled]), select:not([disabled]), textarea:not([disabled]), [tabindex]:not([tabindex="-1"]):not([disabled]), details:not([disabled]), summary:not(:disabled)'
16  );
17};