Load concurrent jquery versions

by riaanc

HTML

<script src="https://code.jquery.com/jquery-1.8.2.min.js"></script>
<input type="text" class="form-control"/>
<button class="btn btn-primary" id="btnTest">
  Test
</button>

<div class="modal fade" tabindex="-1" role="dialog" id="dlgTest">
  <div class="modal-dialog" role="document">
    <div class="modal-content">
      <div class="modal-header">
        <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">&times;</span></button>
        <h4 class="modal-title">Modal title</h4>
      </div>
      <div class="modal-body">
        <p>One fine body&hellip;</p>
      </div>
      <div class="modal-footer">
        <button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
        <button type="button" class="btn btn-primary">Save changes</button>
      </div>
    </div><!-- /.modal-content -->
  </div><!-- /.modal-dialog -->
</div><!-- /.modal -->

JavaScript

function loadScript(path, callback) {

    var done = false;
    var scr = document.createElement('script');

    scr.onload = handleLoad;
    scr.onreadystatechange = handleReadyStateChange;
    scr.onerror = handleError;
    scr.src = path;
    document.body.appendChild(scr);

    function handleLoad() {
        if (!done) {
            done = true;
            callback(path, "ok");
        }
    }

    function handleReadyStateChange() {
        var state;

        if (!done) {
            state = scr.readyState;
            if (state === "complete") {
                handleLoad();
            }
        }
    }
    function handleError() {
        if (!done) {
            done = true;
            callback(path, "error");
        }
    }
}

var $jqn = null;

loadScript("https://code.jquery.com/jquery-3.2.1.min.js", function(){
	$jqn = $.noConflict();
  loadScript("https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js", function(){});
  $jqn("head").append('<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" crossorigin="anonymous">');
  docReady();
});

//-----------------------------------------------------


//document.ready gets replaced by this
//replace current contents of file > $ becomes $jqn
function docReady()
{
  //........
    console.log("myDocReady: "+$jqn.fn.jquery);
}