Grunt task for node-browserify


Grunt task for node-browserify.

This plugin requires Grunt ~0.4.0.

Install this grunt plugin with:

npm install grunt-browserify --save-dev

Then add this line to your project's grunt.js Gruntfile:


An important note for those running the latest release of grunt-browserify: the newest version (>3.0) incorporates breaking changes from Browserify which REMOVED BUNDLE OPTIONS. All options to browserify must now be passed in the browserifyOptions hash.

Most simply, Browserify is a tool for taking your CommonJS-style Javascript code and packaging it for use in the browser. Grunt-Browserify provides the glue to better integrate Browserify into your Grunt-based development workflow.

For JavaScripters unfamiliar with CJS-style code and the Node ecosystem, moving to Browserify can be a bit confusing. Writing your client-side code as CJS modules allows for smaller, easier to understand files that perform one task well. These modules, because of their simplicity, will be significantly easier to use across projects. CJS modules also help to expose the dependency graph inherent in your code, allowing you to write cleaner, more-maintainable modules. As Alex MacCaw writes:

CommonJS modules are one of the best solutions to JavaScript dependency management.

CommonJS modules solve JavaScript scope issues by making sure each module is executed in its own namespace. Modules have to explicitly export variables they want to expose to other modules, and explicitly import other modules; in other words, there's no global namespace.

(A note to AMD fans that the benefits above are not unique to the CJS style of writing JavaScript modules, but the ease-of-interoperability with Node.JS code is a plus of CJS.)

As you begin to write your client-side code in small, reusable modules, you start to have a lot more files to manage. At the same time, you need to integrate these files with other client-side libraries, some of which do not play particularly nicely with a CJS module system. The simplicity provided by CJS modules can be lost as build complexity is increased and Browserify compilation time gets out of control.

Run this task with the grunt browserify command. As with other Grunt plugins, the src and dest properties are most important: src will use the Grunt glob pattern to specify files for inclusion in the browserified package, and dest will specify the outfile for the compiled module.

The current version of grunt-browserify sticks as close to the core browserify API as possible. Additional functionality can be added via the rich ecosystem of browserify transforms and plugins.

The following task options are supported:

Type: [String:String]

Browserify can alias files or modules to a certain name. For example, require(‘./foo’) can be aliased to be used as require(‘foo’). Aliases should be specified as fileName:alias. Filenames are parsed into their full paths with path.resolve. Module names will be required directly.

A note on alias mappings, which was a functionality pre 2.0 that was removed: its behavior can be reproduced with @joeybaker's remapify plugin, as demonstrated in the code below:

var remapify = require('remapify')
  browserify: {
    options: {
      preBundleCBfunction (b) {
        b.plugin(remapify, [
            cwd: './client/views/', // set the directory to look in 
            src: '**/*.js', // glob for the files to remap 
            expose: 'views' // this will expose `__dirname + /client/views/home.js` as `views/home.js` 
    // targets here 

Type: String Default: empty string

The string will be prepended to the output. Template strings (e.g. <%= config.value %> will be expanded automatically.

Type: [String]

Specifies files to be required in the browserify bundle. String filenames are parsed into their full paths with path.resolve.

Type: [String]

Specifies files to be ignored in the browserify bundle. String filenames are parsed into their full paths with path.resolve. Globbing patterns are supported.

Type: [String]

Specifies files or modules to be excluded in the browserify bundle. Globbing patterns are supported; globbed filenames are parsed into their full paths.

Type: [String] or [String:String].

Specifies id strings which will be loaded from a previously loaded, “common” bundle. That is to say, files in the bundle that require the target String will assume that the target is provided externally.

The secondary form of this option follows the format of alias above, and will externalise the ids specified in the alias array. This second form allows for the declaration of a single alias array which can be supplied to one bundle's alias option and another option's external option.

In either case, globbing patterns are supported.

Type: [String || Function] or [[String || Function, Object]]

Specifies a pipeline of functions (or modules) through which the browserified bundle will be run. The transform can either be a literal function, or a string referring to a NPM module. The browserify docs themselves explain transform well, but below is an example of transform used with grunt-browserify to automatically compile coffeescript files for use in a bundle:

browserify: {
  dist: {
    files: {
      'build/module.js': ['client/scripts/**/*.js', 'client/scripts/**/*.coffee'],
    options: {
      transform: ['coffeeify']

Transforms can also be provided with an options hash; in this case, the transform should be specified as an array of [transformStringOrFn, optionsHash].

Type: [String || Function] Register a browserify plugin with the bundle. As with transforms, plugins are identified with either their NPM name (String) or a function literal.

Type: Object A hash of options that are passed to browserify during instantiation. Browserify Github README

Type: Boolean If true, invoke watchify instead of browserify.

Type: Boolean If true and if watch above is true, keep the Grunt process alive (simulates grunt-watch functionality).

Type: Function (b)

An optional callback function, that will be called before bundle completion. b is the browerify instance that will output the bundle.

Type: Function (err, src, next)

An optional callback function, which will be called after bundle completion and before writing of the bundle. The err and src arguments are provided directly from browserify. The next callback should be called with (err, modifiedSrc); the modifiedSrc is what will be written to the output file.

In lieu of a formal styleguide, take care to maintain the existing coding style. Add unit tests for any new or changed functionality. Lint and test your code.


Copyright (c) 2013-2014 Justin Reidy Licensed under the MIT license.