JavaScript selectionchange event for a particular element only

I want to implement a JavaScrit selectionchange event on a particular div element, so if the user selects text from the DOM I want to show a highlighter box. I have implemented this for web with an onmouseup event. But I am stuck trying to implement this for mobile devices.

For mobile browsers I am binding document.selectionchange event on the DOM, but I want this to only apply for a particular element which has the content-editable class. So the highlighter will show only when the user selected text within the container on page which has the content-editable class.

document.addEventListener("selectionchange", function(evt) { 
  // Now this functionality only apply for content-editable class div.
});

How can I implement this functionality? Perhaps it could be implemented with a recursive function to find parentElement's class of anchorNode of selected text like:

var selection = ctrl.window.getSelection();

What is the best way to do this?