Append Dynamic version(variable ) in Script tag and stylesheet based on time

If you are looking for the shortest solution, how about this?

<script>document.write('<link href="/assets/cder.css?v=' + Date.now() + '" rel="stylesheet" />');</script>

A worthy alternative should be:

<script>
    var link = document.createElement('link');
    link.rel = 'stylesheet';
    link.href = '/assets/cder.css?v=' + Date.now();
    document.body.appendChild(link);
</script>

Well, you must escape the closing script tag as follows:

<script>document.write('<script src="/assets/abc.js?v=' + Date.now() + '"><\/script>');</script>

An example of how to add several scripts:

<script>
  var scripts = [
    '/assets/abc.js',
    '/assets/def.js',
  ];

  for (var i = 0; i < scripts.length; i++) {
    var script = document.createElement('script');
    script.onerror = function() {
      alert('Could not load ' + this.src);
    };
 
    script.src = scripts[i] + '?v=' + Date.now();
    document.body.appendChild(script);
  }
</script>

You could do this dynamically from javascript.

<script>
var my_awesome_script = document.createElement('script');
my_awesome_script.setAttribute('src', '/assets/abc.js?v='+new Date.getTime()); //was missing single quote
document.head.appendChild(my_awesome_script);
</script>

taken from Stack overflow answer