JSFiddle - React, Tailwind, and code Playground

HTML

<iframe id='container'> </iframe>
<a href='' target='container' onclick="document.getElementById('container').src = 'http://www.analysis.im/uploads/seminar/pdf-sample.pdf'; return false;"> download </a>

JavaScript

/*require(["dojo/request/iframe"], function(iframe){
    for(var i = 0; i < 10; i++){
      iframe("", {
       data: { test:123 }
      });
    }
});*/

dojo.query("a[target='viewer']", "click", function(data){ alert(data);});

function loadContent(){
    alert(1);
}