JAVASCRIPT

javascript include js file

function loadScript( url, callback ) {
  var script = document.createElement( "script" )
  	  script.type = "text/javascript";
      script.src = url;
 	  script.onload = function() {
     	callback()
      };
     document.head.appendChild(script); 
}
// call the function...
loadScript("js/myscript.js", function() {
  alert('script ready!'); 
});

include other js files in a js file

document.writeln("<script type='text/javascript' src='Script1.js'></script>");
document.writeln("<script type='text/javascript' src='Script2.js'></script>");

javascript include a js file from another

// jQuery
$.getScript('/path/to/imported/script.js', function()
{
    // script is now loaded and executed.
    // put your dependent JS here.
});

How do I include a JavaScript file in another JavaScript file?

<script type="module">
  import { hello } from './hello.mjs'; // Or the extension could be just `.js`
  hello('world');
</script>