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javascript - jQuery CDN is not loading on LocalHost

I have a jquery cdn loading from the following:

<head>
.
.
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
</head>

then in the body I have my source for my script

<body>
.
.<script src="app.js"></script>
</body>

This is all on local, but when I view in browser I keep getting the following errors in console:

GET file://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js
Uncaught ReferenceError: $ is not defined 

I assume this is saying the jQuery function "$..." is undefined because there is an error in GET of the CDN, why would this be happening on local?

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1 Answer

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by (71.8m points)

You aren't actually running on localhost (http://localhost) but on the local file system (file:///path/to/whatever.html). The protocol is copied with the // link to file://ajax.googleapis.com which of course doesn't exist.

You should set up a server on your computer so that you'd have an actual localhost accessed with the http protocol. It would have other benefits as well since browsers act a bit differently also in other regards when the page is loaded directly from the file system.


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