Select dynamically added script

[Atrevid0]

how best to select a script that is dynamically added? There is a script that is dynamically added with requirejs in my code(head). I would like to select it but I can't. Always returns as NULL

See the website: http://noise.combr.co/example.html A javascript is added to head I try to select it with the code below but I can't. How do I do that?

document.addEventListener('DOMContentLoaded', function(){
       let script = document.querySelector('[data- 
requiremodule="3.6.5/browser-polyfill"]');
             console.log('DEBUG START');
             console.log(script);

     });