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Run JSLint from the command line under Node.js
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  • Node is a V8 based framework for writing Javascript applications outside the browser.

  • JSLint is a code quality tool that checks for problems in Javascript programs.

  • node-lint lets you run JSLint from the command line.

  • node-lint currently supports node version 0.2.1



$ npm install lint


You can use node-lint directly if you have node in your $PATH:

$ ./node-lint path/to/your/file.js

Or if you installed it using npm:

$ node-lint path/to/your/file.js

Otherwise, you need to run it with node:

$ node node-lint path/to/your/file.js

You can also specify a directory param and node-lint will find all .js files under that directory and its subdirectories:

$ node node-lint dir1/ dir2/



You can set JSLint options by modifying the default config.js file or even override the default config by passing another config file with the optional --config parameter, e.g.

$ node-lint file1 file2 dir1 dir2 --config path/to/your/config/file.json

For example, if the default config.json has:

    "adsafe"       : false,
    "bitwise"      : true,
    "error_prefix" : "\u001b[1m",
    "error_suffix" : ":\u001b[0m "

And your own path/to/your/config/file.json looks like:

    "bitwise"      : false,
    "browser"      : false

Then the final options used will be:

    "adsafe"       : false,
    "bitwise"      : false,
    "browser"      : false,
    "error_prefix" : "\u001b[1m",
    "error_suffix" : ":\u001b[0m "

Take a look at JSLint's Options to see what to put in the options variable.


By default node-lint uses an internal reporter function to output it's results to the console. For basic use it's possible to alter the error_prefix and error_suffix colors within your config.js file. This will prepend or append coloring information to the results when JSLint complains about your code. There may be times when a more customizable reporting system might be needed (i.e. IDE/Text Editor integrations or customized console outputs).

node-lint allows you to designate a custom reporter for outputting the results from JSLint's run. This reporter function will override the default function built into node-lint. To utilize a custom reporter first create a js file that has a function in it named reporter:


var sys = require('sys');

function reporter(results) {
    var len = results.length;
    sys.puts(len + ' error' + ((len === 1) ? '' : 's'));

Then when you run node-lint from the command line, pass in the customized reporter:

$ ./node-lint path/to/file.js --reporter path/to/file/example-reporter.js

For brevity sake, this is a fairly simple reporter. For more elaborate examples see the examples/reporters/ directory or examples/textmate/.

The sample XML reporter examples\reporters\xml.js produces reports which can also be integrated with a Continuous Integration server like Hudson using the Violations Plugin.

Please see the wiki for integration with various editors.


To contribute any patches, simply fork this repository using GitHub and send a pull request to me <>. Thanks!


  • tav, wrote node-lint

  • Felix Geisendörfer, clarified Node.js specific details

  • Douglas Crockford, wrote the original JSLint and rhino.js runner

  • Nathan Landis, updated node-lint to Node's new API.

  • Oleg Efimov, added support for overridable configurations, running node-lint from a symlink and updates to reflect Node.js API changes.

  • Matthew Kitt, added support for configurable reporters, various code cleanups and improvements including updates to reflect Node.js API changes.

  • Corey Hart, updated node-lint with multiple files and config support.

  • Mamading Ceesay, added support for using node-lint within Emacs.

  • Matt Ranney, updated node-lint to use sys.error.

  • Cliffano Subagio, added npm installation support, XML reporter, and directory param support.

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