Question

Is it possible to load js file on some event like mouseover or click?
I try to load a whole js file not a specific function.

Answer 1

This example loads the specified js file on onClick() event of button

<button onclick="myFunction()">Click me</button>

<script type="text/javascript">
   function myFunction(){

          var file = document.createElement("script");
          file.setAttribute("type", "text/javascript");
          file.setAttribute("src", "js/js_file.js");
          document.getElementsByTagName("head")[0].appendChild(file);

   }
</script>

Similarly, you can also load the js on onMouseOver() event of the button or any other HTML element.