javascript - How to load local files if CDN is not working -


i using cdn js , css files.

i searched in google how load local data if cdn not working.

i found link written this

<script class="jsbin" src="http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>         <script type="text/javascript">             if (typeof jquery == 'undefined') {                 document.write(unescape("%3cscript src='js/plugins/jquery-1.8.2.min.js' type='text/javascript'%3e%3c/script%3e"));             }         </script>

yes working tried cdn network ,then not downloading local. if cdn not working showing error in page , page not working due missing js file. means :

<script type="text/javascript" src="http://code.jquery.com/ui/1.9.1/jquery-ui.js"></script> <script type="text/javascript">     if (typeof jquery == 'undefined') {         document.write(unescape("%3cscript src='include/js/jqueryplugin/jquery.min.js' type='text/javascript'%3e%3c/script%3e"));     } </script>

in above case local jquery.min.js not downloading when above cdn not working .

similarly how css(searched in google , not found solution).

how know cdn not working , download respective files local.

please help

thanks in advance

you can use scripts below: 

<script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script> <script>    window.jquery || document.write('<script src="/scripts/jquery.1.9.1.min.js"><\/script>')</script> <script src="//ajax.googleapis.com/ajax/libs/jqueryui/1.10.2/jquery-ui.min.js"></script> <script>    window.jquery.ui || document.write('<script src="/scripts/jquery-ui.min.js"><\/script>')</script>

hope usefull!


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