Analyze and debug JavaScript (or Sass or LESS) code bloat through source maps.

The source map explorer determines which file each byte in your minified code came from. It shows you a treemap visualization to help you debug where all the code is coming from.

Tern is a stand-alone code-analysis engine for JavaScript. It is intended to be used with a code editor plugin to enhance the editor's support for intelligent JavaScript editing. Features provided are:

Autocompletion on variables and properties
Function argument hints
Querying the type of an expression
Finding the definition of something
Automatic refactoring 

Tern is open-source (MIT license), written in JavaScript, and capable of running both on node.js and in the browser.