Hi, please try the following :

Go to

Tools -> Options -> Text Editor -> JavaScript -> Intellisense -> References

select the Refrence Group as Implicit(Web) and make sure you have references to the Jquery-x.x.x.intellisense.js file . x.x.x refres to the Jquery version you are using.

This error popup doesn't mean that IntelliSense doesn't work. It means, that Visual Studio is unclear of what type of object you are using and what method you want to invoke on it.

 

The problem occurs when you try to work around in jQuery and mix up jQuery and JavaScript. You should understand that JavaScript is not a Microsoft product that is why, a third-party framework needs to be up to standards of IDE. Read this thread for more on documentation and settings.