Function activeElt

external/.scrollLibs.js:602–616

()

  }

  function activeElt() {
    // IE and Edge may throw an "Unspecified Error" when accessing document.activeElement.
    // IE < 10 will throw when accessed while the page is loading or in an iframe.
    // IE > 9 and Edge will throw when accessed in an iframe if document.body is unavailable.
    var activeElement
    try {
      activeElement = document.activeElement
    } catch (e) {
      activeElement = document.body || null
    }
    while (activeElement && activeElement.shadowRoot && activeElement.shadowRoot.activeElement) {
      activeElement = activeElement.shadowRoot.activeElement
    }
    return activeElement
  }

  function addClass(node, cls) {
    var current = node.className