I want to inject script like this using jQuery getScript function
<script type="text/javascript"
        src="https://app.test.com/test.js"
        data-client-key="321jj33-dasd333"
></script> 
I want to add that extra variable with its value which is data-client-key.
What I've done so far is like this:
var test = "https://app.test.com/test.js";
$.getScript(test, function(){
  $.ajax({    
    //post data using ajax
  });
});
				
                        
You can create a script tag with jQuery like this
Hope it help you