SharePoint jquery javascript无法运行，但可以从控制台运行

Question

I have the following code which works from console but does not work on page load. The page does not have any error.

<div class="nav-report-category">
</div>

<script src="https://code.jquery.com/jquery-3.0.0.js"></script>
<script type="text/javascript">
$(document).ready(function(){
    $(".ms-listviewtable tr[class='ms-gb']").each(function(){
        alert('test 3');
    });
    var $mydiv = document.getElementsByClassName("nav-report-category")[0];
    var $liTag = document.createElement('li');
    var $aTag = document.createElement('a');


}); 
</script>

Answer 1

 <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <div class="nav-report-category"> </div> <script src="https://code.jquery.com/jquery-3.0.0.js"></script> <script type="text/javascript"> $(document).ready(function(){ $(".ms-listviewtable tr[class='ms-gb']").each(function(){ alert('test 3'); }); var $mydiv = document.getElementsByClassName("nav-report-category")[0]; var $liTag = document.createElement('li'); $mydiv.append($liTag); var $aTag = document.createElement('a'); $mydiv.append($aTag); }); </script> 

Not sure what you are trying to do but if you wanted it in the DOM you have to also append it.If this is the thing that "was not working".