jquery conflict

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Hi, I saw a piece of code to solve the js conflict, but I don't get how to make it work. When I put it I do not have any more issues when editing a page , but I have issues on the front end with jquery not working anymore ... I actually never really understood how to handle those jquery/css conflicts, I would appreciate some link to an easy to understand tutorial .... many thanks

Here is the code I found

<script src="<?= $view->getThemePath() ?>/js/bootstrap.js"></script> 
<script>var $j = jQuery.noConflict(true);</script>
<script>
  $(document).ready(function(){
   console.log($j().jquery); // This prints Bootstrap's jQuery
  });
</script>


And here is my original code, in case someone would be kind enough to help me find out how I should be placing this code

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.4/jquery.min.js"></script> 
<script src="<?= $view->getThemePath() ?>/js/bootstrap.js"></script> 
<script src="http://cdnjs.cloudflare.com/ajax/libs/bootstrap-datepicker/1.3.0/js/bootstrap-datepicker.min.js"></script> 
<script src="<?= $view->getThemePath() ?>/js/custom.js"></script>
<script src="http://localhost:35729/livereload.js"></script> 
</div>
<?php Loader::element('footer_required') ?>
</body>