Rich IntelliSense for jQuery

Rich IntelliSense for jQuery

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Update: A new Hotfix is availble to complement this file.

A while back we updated VS2008 IntelliSense to not fail when referencing jQuery.  However, getting IntelliSense for chained calls and rich summary/parameter hints still required adding special comments to a few thousand lines of jQuery.  If you didn't have the time, you could download such a file from friendly members of the community such as James and Brennan.

As part of our new partnership with jQuery, yesterday we announced the availability of the official IntelliSense documentation file.  As you can see, our friends at jQuery have added a new download link for Visual Studio at


You can also download the file directly from  As you might guess, this documentation file corresponds with the latest version of jQuery (which is currently 1.2.6).  While this file has a "js" extension, it's really just a documentation file.  You do not want to run this file in the browser.

How do I use this file (today)?

If you're inside an ASPX page, you will need to add the following lines of code into (normally) the head of your page:


Why do we have a server-side conditional statement?  IntelliSense disregards conditional statements of this type, and thus loads the "vsdoc" file (overriding the normal one).  At runtime the if (false) statement will ensure it this documentation file is not rendered (and executed) as script.  This trick allows the "switching" behavior you want.

If you're in a JavaScript file, use the normal file reference syntax to refer to the "vsdoc" file.


There's no need for tricks here since this comment is only meaningful to IntelliSense.

How do I use this file (in the near future)?

The ideal user experience should be one where you do not need special tricks as mentioned above.  Really, you shouldn't need to mention the "vsdoc" file name at all.  To that end, we plan on releasing a Hotfix that will enable this (stay tuned!).  Given normal references such as...

image image

...IntelliSense will opportunistically search for "jquery-1.2.6-vsdoc.js" and load that file instead.  Generally, given script name "x", IntelliSense will opportunistically search for "x-vsdoc.js".  If not found, it will then search for "x.debug.js".  You just need to make sure to place your "vsdoc" file next to the normal file.  Note, if you use jquery-1.2.6.min.js, you may need to rename the file to match the search pattern.

What are the advantages of this file?

One unique benefit of the file we have released is that it supports and understands jQuery plug-ins.  For example, given the plug-in below...

image would see "myplugin" show up in IntelliSense.


We've noticed a few plug-ins do not work, and commonly this is because there is an IntelliSense incompatibility issue with the plug-in itself (as opposed to the jQuery documentation file).

Hope this helps!

Jeff King
Program Manager
Visual Studio Web Tools

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    ie: /// <reference path="~\js\jquery-vsdoc.js"/>

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