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JSHint is a community-driven tool to detect errors in JavaScript code and enforce your team's coding conventions.

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JSHint, A Static Code Analysis Tool for JavaScript

JSHint is a community-driven tool to detect errors and potential problems in JavaScript code and to enforce your team's coding conventions. We made JSHint very flexible so you can easily adjust it to your particular coding guidelines and the environment you expect your code to execute in.

Our goal is to help JavaScript developers write complex programs without worrying about typos and language gotchas.

We believe that static code analysis programs—as well as other code quality tools—are important and beneficial to the JavaScript community and, thus, should not alienate their users.

For general usage information, visit our website: http://jshint.com/.

Reporting a bug

To report a bug simply create a new GitHub Issue and describe your problem or suggestion. We welcome all kind of feedback regarding JSHint including but not limited to:

  • When JSHint doesn't work as expected
  • When JSHint complains about valid JavaScript code that works in all browsers
  • When you simply want a new option or feature

Before reporting a bug look around to see if there are any open or closed tickets that cover your issue. And remember the wisdom: pull request > bug report > tweet.

Installation

You can install JSHint via NPM:

npm install jshint -g

We also provide platform wrappers for Rhino, JavaScriptCore and Windows Script Host. To use them, clone this repo and run our build command:

node make.js

Usage

jshint -h

You can also require JSHint itself as a module.

var jshint = require('jshint');

Note: If you are using npm v1.x be sure to install jshint locally (without the -g flag) or link it globally.

Custom Reporters

Specify a custom reporter module (see example/reporter.js).

--reporter path/to/reporter.js

Use a jslint compatible xml reporter.

--jslint-reporter

Show additional non-error data generated by jshint (unused globals etc).

--show-non-errors

Configuration Options

Note: This behavior described below is very different from versions prior to 0.6.

The CLI uses the default options that come with JSHint.

Only one extra option is unique to node-jshint: globals allows you to define an object of globals that get ignored for every file. To see an example you can look at how whitelisted globals are defined in the jshint code

To have your own configuration apply, there are several methods you can use:

Specify Manually

Setting the --config=/path/to/your/config command line option to specify your own configuration file outside of the directory tree for your project.

Within your Project's Directory Tree

When the CLI is called, and a configuration file isn't specified already, node-jshint will attempt to locate one for you starting in pwd. (or "present working directory") If this does not yield a .jshintrc file, it will move one level up (..) the directory tree all the way up to the filesystem root. If a file is found, it stops immediately and uses that set of configuration.

This setup allows you to set up one configuration file for your entire project. (place it in the root folder) As long as you run jshint from anywhere within your project directory tree, the same configuration file will be used.

Home Directory

If all the methods above do not yield a .jshintrc to use, the last place that will be checked is your user's $HOME directory.

File Extensions

Default extension for files is ".js". If you want to use JSHint with other file extensions (.json), you need to pass this extra extension as an option :

--extra-ext .json

Ignoring Files and Directories

If there is a .jshintignore file in your project's directory tree, (also provided you run jshint from within your project's directory) then any directories or files specified will be skipped over. (behaves just like a .gitignore file)

Note: Pattern matching uses minimatch, with the nocase option. When there is no match, it performs a left side match (when no forward slashes present and path is a directory).

FAQ

How do I turn off "mixed tabs and spaces" warning?

If you're using so-called smart tabs then we have an option smarttabs for you. Otherwise, your solution is to run JSHint with a custom reporter that discards any warnings you don't like. For example, this example reporter discards all warnings about mixed tabs and spaces.

Contributing

Look for a file named CONTRIBUTING.md in this repository. It contains our contributing guidelines. We also have a mailing list.

License

JSHint is distributed under the MIT License. One file and one file only (src/stable/jshint.js) is distributed under the slightly modified MIT License.

Attribution

Core Team members:

Maintainer: Anton Kovalyov

Thank you!

We really appreciate all kind of feedback and contributions. Thanks for using and supporting JSHint!

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JSHint is a community-driven tool to detect errors in JavaScript code and enforce your team's coding conventions.

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