Marionette.js. Marionette functions. Marionette.isNodeAttached

Determines whether the passed-in node is a child of the document or not.

by marionettejs

HTML

<script src="https://rawgit.com/marionettejs/backbone.marionette/next/lib/backbone.marionette.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.2.2/jquery.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.8.3/underscore-min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/backbone.js/1.3.3/backbone-min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/backbone.radio/2.0.0/backbone.radio.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/backbone.marionette/3.0.0/backbone.marionette.js"></script>

JavaScript

const myDiv = document.createElement('div');
Mn.isNodeAttached(myDiv);
// => false

$('body').append(myDiv);
console.log(Mn.isNodeAttached(myDiv));