I can't get jQuery to work [closed]

Answer 1

Change

<script src="//ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>

to

<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>

Problem is that //ajax.googleapis.com is used to avoid problems with different protocols (http/https). Browser will add protocol used for a page. When you open your HTML from a file on your hard drive, file:// protocol is used. And browser tries to load jquery using file://ajax.googleapis.com, but that will not work because you have no folder ajax.googleapis.com on your hard drive. So, simply specify protocol for jquery explicitly

Answer 2

The problem here is the scheme relative url that you are using to load jQuery. Since I assume you are loading the html file locally, your page's scheme is file://. When you go to load jQuery using // as the source it is looking on your local filesystem for a folder called ajax.googleapis.com. Replace // in your script tag with https:// to solve your problem.

Answer 3

jQuery can't be found with this code if you simply paste it in Notepad, save it and open the file in a browser.

You must either :

• serve your file using an HTTP server (i.e. not access it using file://)
• or change the URL of jQuery to not use a protocol relative URL (an URL starting with //)

The simplest fix would be to change

<script src="//ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js">

to

<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js">

but the serious one will be to always test using a local HTTP server (it's very easy to install Apache on any OS including Windows). There are many things you can't test with file://, including most cross domain ajax operations.