JQuery script not loaded, on appendChild

Question

I load my script files dynamically using this code,

<script type="text/javascript">
  var newscript = document.createElement('script');
  newscript.type = 'text/javascript';
  newscript.src = '../static/js/jquery.js';
  document.getElementsByClassName('container')[0].appendChild(newscript);

  var newscript = document.createElement('script');
  newscript.type = 'text/javascript';
  newscript.src = '../static/js/report_app.js';
  document.getElementsByClassName('container')[0].appendChild(newscript);

</script>

It gives an error like,

Reference error: $ is not defined 

c report_app.js.

I thought the jquery.jsscript should be loaded in the DOM when parsing the next file report_app.js.

But the error indicates that jquery.jsit is not running. How to ensure loading one script file before running the next?

Answer 1

This is because the script is added asynchronously, you can use the onload callback

function addScript(path, callback) {
    var newscript = document.createElement('script');
    newscript.type = 'text/javascript';
    newscript.src = path;
    newscript.onload = callback;
    document.body.appendChild(newscript);

}

addScript('http://code.jquery.com/jquery-1.11.2.js', function () {
    addScript('../static/js/report_app.js');
})

Demo: Fiddle