doubleclick clickthrough/exit button question

So I made a banner in edge to be trafficked through doubleclick and I need to add a click through (they call it an "exit") to track the banner and have it go to a destination URL. I found information on this but am not exactly sure what to do. Here is what they say.

1. Create a button element in your creative using a <div> tag. Create the element in the HTML file and style it in the CSS file. Then assign the ID bg-exit to your element.Sample <div> tag object in the HTML file:

   <div id="bg-exit"></div>

   Sample styling and ID selector in the CSS file:

   #bg-exit {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0px;
    left: 0px;
    cursor: pointer;
    opacity: 0;
}

This part I get and put it in my index file.

the second part says I need to put code in my java script file and I tried putting it in the "edge.js" file and I get a java script error when trying to open it in edge. Here is the code.

Add exit functionality to the JavaScript by calling this method: Enabler.exit('exit name goes here');

Code snippet