Prevent iframe adding body class iframe-mode autoIframeMode: false

[Williamg12]

adminlte.js (v 3.1.0) keeps adding css class to html > body class="iframe-mode".
Tried disabling with following jquery, but its not working:

 $('.content-wrapper').IFrame({
  onTabClick(item) {
    return item
  },
  onTabChanged(item) {
    return item
  },
  onTabCreated(item) {
    return item
  },
  autoIframeMode: false,
  autoItemActive: true,
  autoShowNewTab: true,
  allowDuplicates: true,
  loadingScreen: 750,
  useNavbarItems: true
})

Its throwing an error: Uncaught ReferenceError: $ is not defined
How to prevent automatic iframe mode inside html?