Javascript not running on Microsoft Edge

Hi,

I have the below custom Javascript code which sets a fields value in my Nintex form.  This works fine with Internet Explorer 11, but it does not run with Microsoft Edge.  Do you know why this might be?

var dateNow = document.getElementById(varReferenceNumber);
dateNow.innerText = Date.now();
console.log(dateNow);

Thank you.

Kenny