On my site I have included the google version of jquery like so:
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.0/jquery.min.js"></script>
But of course this fails when I am offline. I have downloaded the file to a local location, so I can serve it up using my own web server (e.g. http://127.0.0.1/jquery.min.js) even if the internet is not available on this computer. But as a rule I'd prefer to use to online version if it is available. How can I specify the local version as a fallback, if the online version is not available?
