JQuery removeClass not working in code below

[iamingh]

Challenge Remove Classes from an element with jQuery has an issue.
User Agent is: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/56.0.2924.87 Safari/537.36 OPR/43.0.2442.991.
Please describe how to reproduce this issue, and include links to screenshots if possible.

My code:

<script>
  $(document).ready(function() {
    $("button").addClass("animated bounce");
    $(".well").addClass("animated shake");
    $("#target3").addClass("animated fadeOut");
    $("button").removeClass("btn-default");

  });
</script>

<!-- Only change code above this line. -->

<div class="container-fluid">
  <h3 class="text-primary text-center">jQuery Playground</h3>
  <div class="row">
    <div class="col-xs-6">
      <h4>#left-well</h4>
      <div class="well" id="left-well">
        <button class="btn target" id="target1">#target1</button>
        <button class="btn target" id="target2">#target2</button>
        <button class="btn target" id="target3">#target3</button>
      </div>
    </div>
    <div class="col-xs-6">
      <h4>#right-well</h4>
      <div class="well" id="right-well">
        <button class="btn target" id="target4">#target4</button>
        <button class="btn target" id="target5">#target5</button>
        <button class="btn target" id="target6">#target6</button>
      </div>
    </div>
  </div>
</div>

[iamingh]

Please mark the above listed bug as invalid. I found the missing link.
I removed the class : btn-default from button tags, that stopped the execution.