No known issues at present, please report anything you find with 1.4.2.
Choice of JSlint (current), JSLint (old) and JSHint.
Simple .vsix double-click installation. Also available on the Visual Studio Gallery website, and downloadable directly from within Visual Studio using Tools->Extension Manager.
Predefine JSLint global variables, per file or globally.
CSS validation.
Detection of constants (optional)
1.4.2 - support maxcomplexity options in jshint. updated jshint&jslint. Thanks to Fredrik Mörk per solution options now have a relative path. aligned labels in options. Now excludes files from build correctly.
1.4.1 - bugfixes - UI should support dpi modes better, global not globals, hide warn on unused global option for jshint (and make visible for everyone else), fix some errors oldjslint was giving since 1.3.10. context menu appears in js files in editor, items in solution folders don't throw exceptions when right clicking.
1.4.0 - per solution config. new lint & hint. Visual Studio 2012 Alpha support.