JSCS — JavaScript Code Style

JSCS is a code style linter for programmatically enforcing your style guide. You can configure JSCS for your project in detail using over 150 validation rules, including presets from popular style guides like jQuery, Airbnb, Google, and more.

JSCS has built-in presets to check your code against. Or you can create your own and share them as npm packages.

To study more in detail & download refer this.