How to check loaded jQuery UI version?

In this post I will show how to check currently loaded jQuery UI version on the page. Unlike checking loaded jQuery version ( $().jquery ), checking jQuery UI version is a bit different.

Checking currently loaded jQuery UI version on the page:

// Returns jQuery UI version (ex: 1.8.2) or undefined
$.ui.version

// Alternatively
jQuery.ui.version

You would most probably use it in the if statement:

if($.ui && $.ui.version){
    // jQuery UI is loaded
}

You can also check if jQuery UI is loaded or not:

// Checking if jQuery UI is loaded or not
if($.ui){
    // jQuery UI is loaded
}else {
    // jQuery UI is not loaded
}