How do I get the jQuery-UI version?

Question

You can use $.ui.version, it’s actually the property jQuery UI looks for when determining if it should load itself (if it’s already there, abort).

For example here’s a fiddle including version 1.8.4.

Unfortunately, $.ui.version was added in jQuery-UI version 1.6.

For earlier versions, you can check for $.ui though.

So, in this case, the following might be good enough:

var version = $.ui ? $.ui.version || "pre 1.6" : 'jQuery-UI not detected';