Function maybeInstrumentsNodes

3p/environment.js:98–125

* Instrument added nodes if they are instrumentable iframes. * @param {!Window} win * @param {!Array<!Node>|NodeList<!Node>|NodeList<!Element>|null} addedNodes

(win, addedNodes)

 * @param {!Array<!Node>|NodeList<!Node>|NodeList<!Element>|null} addedNodes
 */
function maybeInstrumentsNodes(win, addedNodes) {
  for (let n = 0; n < addedNodes.length; n++) {
    const node = addedNodes[n];
    try {
      if (node.tagName != 'IFRAME') {
        continue;
      }
      const src = node.getAttribute('src');
      const srcdoc = node.getAttribute('srcdoc');
      if (src == null || /^(about:|javascript:)/i.test(src.trim()) || srcdoc) {
        if (node.contentWindow) {
          instrumentIframeWindow(node, win, node.contentWindow);
          node.addEventListener('load', () => {
            try {
              instrumentIframeWindow(node, win, node.contentWindow);
            } catch (e) {
              console./*OK*/ error(e.message, e.stack);
            }
          });
        } else if (srcdoc) {
          instrumentSrcdoc(parent, node);
        }
      }
    } catch (e) {
      console./*OK*/ error(e.message, e.stack);
    }
  }
}

/**
 * Installs a mutation observer in a window to look for iframes.