internal webpack plugins

internal webpack plugins

These is a list of plugins, which are internally used by webpack. You should only care about them if you are building a own compiler based on webpack, or introspec the internals.

categories of internal plugins:

• environment
• compiler
• entry
• output
• source
• optimize

environment

Plugins affecting the environment of the compiler.

node/NodeEnvironmentPlugin

Applies node.js style filesystem to the compiler.

compiler

Plugins affecting the compiler

CachePlugin([cache])

Adds a cache to the compiler, where modules are cached.

You can pass an cache object, where the modules are cached. Elsewise one is created per plugin instance.

ProgressPlugin(handler)

Hook into the compiler to extract progress information. The handler must have the signature function(percentage, message). It's called with 0 <= percentage <= 1. percentage == 0 indicates the start. percentage == 1 indicates the end.

entry

Plugins, which add entry chunks to the compilation.

SingleEntryPlugin(context, request, chunkName)

Adds a entry chunk on compilation. The chunk is named chunkName and contains only one module (plus dependencies). The module is resolved from request in context (absolute path).

MultiEntryPlugin(context, requests, chunkName)

Adds a entry chunk on compilation. The chunk is named chunkName and contains a module for each item in the requests array (plus dependencies). Each item in requests is resolved in context (absolute path).

output

FunctionModulePlugin(context, options)

Each emitted module is wrapped in a function.

options are the output options.

If options.pathinfo is set, each module function is annotated with a comment containing the module identifier shortened to context (absolute path).

JsonpTemplatePlugin(options)

Chunks are wrapped into JSONP-calls. A loading algorithm is included in entry chunks. It loads chunks by adding a <script> tag.

options are the output options.

options.jsonpFunction is the JSONP function.

options.publicPath is uses as path for loading the chunks.

options.chunkFilename is the filename under that chunks are expected.

LibraryTemplatePlugin(name, target)

The entries chunks are decorated to form a library name of type type.

webworker/WebWorkerTemplatePlugin(options)

Chunks are loaded by importScripts. Else it's similar to JsonpTemplatePlugin.

options are the output options.

EvalDevToolModulePlugin

Decorates the module template by wrapping each module in a eval annotated with // @sourceURL.

source

Plugins affecting the source code of modules.

APIPlugin

Make __webpack_public_path__, __webpack_require__, __webpack_modules__, __webpack_chunk_load__ accessable. Ensures that require.valueOf and require.onError are not processed by other plugins.

CompatibilityPlugin

Currently useless. Ensures compatiblitly with other module loaders.

ConsolePlugin

Offers a pseudo console if it is not availible.

ConstPlugin

Try to evaluate expressions in if(...) and replace it with true/false.

ProvidePlugin(name, request)

If name is used in a module it is filled by a module loaded by require(<request>).

NodeStuffPlugin

Provide stuff that is normally avalible in node.js modules.

__filename is constant "/index.js". __dirname is constant "/". require.main is the module of your entry module.

It also ensures that module is filled with some node.js stuff if you use it.

NodeStuffRealPathsPlugin

The NodeStuffPlugin only provides pseudo __filename and __dirname. This plugin provide the real __filename and __dirname of the modules.

Include this plugins before NodeStuffPlugin.

node/NodeSourcePlugin

This module adds stuff from node.js that is not avalible in non-node.js environments.

It adds polyfills for process and global if used. It also binds the buildin node.js replacement modules.

node/NodeTargetPlugin

The plugins should be used if you run the bundle in a node.js environment.

If ensures that native modules are loaded correctly even if bundled.

dependencies/AMDPlugin(options)

Provides AMD-style define and require to modules. Also bind require.amd, define.amd and __webpack_amd_options__ to the options passed as parameter.

dependencies/CommonJsPlugin

Provides CommonJs-style require to modules.

dependencies/RequireContextPlugin(modulesDirectories, extensions)

Provides require.context. The parameter modulesDirectories and extensions are used to find alternative requests for files. It's useful to provide the same arrays as you provide to the resolver.

dependencies/RequireEnsurePlugin

Provides require.ensure.

dependencies/RequireIncludePlugin

Provides require.include.

optimize

optimize/LimitChunkCountPlugin(options)

Merge chunks limit chunk count is lower than options.maxChunks.

The overhead for each chunks is provided by options.chunkOverhead or defaults to 10000. Entry chunks sizes are multiplied by options.entryChunkMultiplicator (or 10).

Chunks that reduce the total size the most are merged first. If multiple combinations are equal the minimal merged size wins.

optimize/MergeDuplicateChunksPlugin

Chunks with the same modules are merged.

optimize/RemoveEmptyChunksPlugin

Modules that are included in every parent chunk are removed from the chunk.

optimize/MinChunkSizePlugin(minChunkSize)

Merges chunks until each chunk has the minimum size of minChunkSize.

optimize/FlagIncludedChunksPlugin

Adds chunk ids of chunks which are included in the chunk. This eliminates unnessary chunk loads.

optimize/UglifyJsPlugin(options)

Minimizes the chunks with uglify.js.

options are uglifyjs options.