JavaScript Lint

JavaScript Lint is a JavaScript code quality tool, and running your programs through it is a great way of improving code quality and best practices. The project was based on a similar tool called JSLint. Check out JSLint’s site for a great list of issues that it checks for, including global variables, missing semicolons, and weak equality comparisons.

The good news is that CoffeeScript already “lints” all of its output, so CoffeeScript generated JavaScript is already JavaScript Lint compatible. In fact, the coffee tool has support for a --lint option:

coffee --lint index.coffee
  index.coffee: 0 error(s), 0 warning(s)

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