How to check what version of jQuery is loaded

Question

How do I check which version of jQuery is loaded on the client machine  The client may have jQuery loaded but I don t know how to check it  If they have it loaded how do I check the version and the prefix such as       class   JQuery   class

User · Answer

if  jQuery        jquery loaded

User · Answer

My original  goto  means to get the version   fn jquery     Another  similar  option     jQuery     If there is concern that there may be multiple implementations of     then  jQuery fn jquery  Recently I have had issues using   fn jquery     jQuery on a few sites so I wanted to note a third simple command to pull the jQuery version   If you get back a version number -- usually as a string -- then jQuery is loaded and that is what version you re working with  If not loaded then you should get back undefined or maybe even an error   Pretty old question and I ve seen a few people that have already mentioned my answer in comments  However  I find that sometimes great answers that are left as comments can go unnoticed  especially when there are a lot of comments to an answer you may find yourself digging through piles of them looking for a gem  Hopefully this helps someone out

User · Answer

I have found this to be the shortest and simplest way to check if jQuery is loaded   if  window jQuery           jQuery is available          Print the jQuery version  e g   1 0 0       console log window jQuery fn jquery       This method is used by http   html5boilerplate com and others

User · Answer

just because this method hasn t been mentioned so far - open the console and type         jQuery   As  Juhana mentioned above     jquery will return the version number

User · Answer

You can just check if the jQuery object exists   if  typeof jQuery      undefined           jQuery loaded   jQuery   jquery has the version number   As for the prefix  jQuery should always work  If you want to use   you can wrap your code to a function and pass jQuery to it as the parameter    function                 class    doSomething        works always     jQuery

User · Answer

if  typeof jQuery     undefined              jQuery is loaded   gt  print the version     alert jQuery fn jquery

User · Answer

Go to the developer s Tool   console and write one of the following command  jQuery fn jquery console log jQuery   jquery

User · Answer

In one line and the minimum of keystrokes  oops      alert     jquery

User · Answer

You should actually wrap this in a try catch block for IE      Ensure jquery is loaded -- syntaxed for IE compatibility try       var jqueryIsLoaded jQuery      jQueryIsLoaded true    catch err        var jQueryIsLoaded false    if jQueryIsLoaded          function                site level jquery code here               else          Jquery not loaded

User · Answer

As per Template monster blog  typing  these below scripts will give you the version of the jquery in the site you are traversing now    1  console log jQuery fn jquery    2  console log jQuery   jquery

User · Answer

My preference is   console debug  jQuery     jQuery       jquery    NOT      loaded     Result   jQuery 1 8 0 loaded

[jquery] How to check what version of jQuery is loaded?

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