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jshint Loader

jshint loader for Webpack.


npm i jshint-loader --save


Apply the jshint loader as pre/postLoader in your webpack configuration:

module.exports = {
    module: {
        preLoaders: [
                test: /\.js$/, // include .js files 
                exclude: /node_modules/, // exclude any and all files in the node_modules folder 
                loader: "jshint-loader"
    // more options in the optional jshint object 
    jshint: {
        // any jshint option 
        // i. e. 
        camelcase: true,
        // jshint errors are displayed by default as warnings 
        // set emitErrors to true to display them as errors 
        emitErrors: false,
        // jshint to not interrupt the compilation 
        // if you want any file with jshint errors to fail 
        // set failOnHint to true 
        failOnHint: false,
        // custom reporter function 
        reporter: function(errors) { }

Custom reporter

By default, jshint-loader will provide a default reporter.

However, if you prefer a custom reporter, pass a function under the reporter key in jshint options. (see usage above)

The reporter function will be passed an array of errors/warnings produced by jshint with the following structure:

    id:        [string, usually '(error)'],
    code:      [string, error/warning code],
    reason:    [string, error/warning message],
    evidence:  [string, a piece of code that generated this error]
    line:      [number]
    character: [number]
    scope:     [string, message scope;
                usually '(main)' unless the code was eval'ed]
    [+ a few other legacy fields that you don't need to worry about.]
// ... 
// more errors/warnings 

The reporter function will be excuted with the loader context as this. You may emit messages using this.emitWarning(...) or this.emitError(...). See webpack docs on loader context.

Note: jshint reporters are not compatible with jshint-loader! This is due to the fact that reporter input is only processed from one file; not multiple files. Error reporting in this manner differs from tranditional reporters for jshint since the loader plugin (i.e. jshint-loader) is executed for each source file; and thus the reporter is executed for each file.

The output in webpack CLI will usually be:

WARNING in ./path/to/file.js
<reporter output>



Juho Vepsäläinen

Joshua Wiens

Kees Kluskens

Sean Larkin