JSLint
is a tool that goes
through your JavaScript code and points out bad coding practises, including undeclared variables.
You can now easily integrate JSLint with Visual Studio. [More]

Shows how to improve your ASP.NET MVC web site's performance through far future client side caching of RequireJS modules, while still forcing the browser to refresh its cache the moment you introduce a new version of your modules. [More]

Describes how to use the RequireJS optimizer with code that loads jQuery from a CDN and uses shims for jQuery plugins, avoiding the need to make the plugins into AMD modules. [More]

This article shows how to integrate JavaScript unit testing in your ASP.NET MVC solution. [More]