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2019-08-11 20:48:02 +02:00
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Copy Webpack Plugin

Copies individual files or entire directories to the build directory

Install

npm i -D copy-webpack-plugin

Usage

webpack.config.js

const CopyWebpackPlugin = require('copy-webpack-plugin')

const config = {
  plugins: [
    new CopyWebpackPlugin([ ...patterns ], options)
  ]
}

If you want webpack-dev-server to write files to the output directory during development, you can force it with the write-file-webpack-plugin.

Patterns

A simple pattern looks like this

{ from: 'source', to: 'dest' }

Or, in case of just a from with the default destination, you can also use a {String} as shorthand instead of an {Object}

'source'
Name Type Default Description
from {String|Object} undefined Globs accept minimatch options
fromArgs {Object} { cwd: context } See the node-glob options in addition to the ones below
to {String|Object} undefined Output root if from is file or dir, resolved glob path if from is glob
toType {String} `` toType Options
test {RegExp} `` Pattern for extracting elements to be used in to templates
force {Boolean} false Overwrites files already in compilation.assets (usually added by other plugins/loaders)
ignore {Array} [] Globs to ignore for this pattern
flatten {Boolean} false Removes all directory references and only copies file names.⚠️ If files have the same name, the result is non-deterministic
transform {Function|Promise} (content, path) => content Function or Promise that modifies file contents before copying
transformPath {Function|Promise} (targetPath, sourcePath) => path Function or Promise that modifies file writing path
cache {Boolean|Object} false Enable transform caching. You can use { cache: { key: 'my-cache-key' } } to invalidate the cache
context {String} options.context || compiler.options.context A path that determines how to interpret the from path

from

webpack.config.js

[
  new CopyWebpackPlugin([
    'relative/path/to/file.ext',
    '/absolute/path/to/file.ext',
    'relative/path/to/dir',
    '/absolute/path/to/dir',
    '**/*',
    { glob: '\*\*/\*', dot: true }
  ], options)
]

to

webpack.config.js

[
  new CopyWebpackPlugin([
    { from: '**/*', to: 'relative/path/to/dest/' },
    { from: '**/*', to: '/absolute/path/to/dest/' }
  ], options)
]

toType

Name Type Default Description
'dir' {String} undefined If from is directory, to has no extension or ends in '/'
'file' {String} undefined If to has extension or from is file
'template' {String} undefined If to contains a template pattern

'dir'

webpack.config.js

[
  new CopyWebpackPlugin([
    {
      from: 'path/to/file.txt',
      to: 'directory/with/extension.ext',
      toType: 'dir'
    }
  ], options)
]

'file'

webpack.config.js

[
  new CopyWebpackPlugin([
    {
      from: 'path/to/file.txt',
      to: 'file/without/extension',
      toType: 'file'
    },
  ], options)
]

'template'

webpack.config.js

[
  new CopyWebpackPlugin([
    {
      from: 'src/',
      to: 'dest/[name].[hash].[ext]',
      toType: 'template'
    }
  ], options)
]

test

Defines a {RegExp} to match some parts of the file path. These capture groups can be reused in the name property using [N] placeholder. Note that [0] will be replaced by the entire path of the file, whereas [1] will contain the first capturing parenthesis of your {RegExp} and so on...

webpack.config.js

[
  new CopyWebpackPlugin([
    {
      from: '*/*',
      to: '[1]-[2].[hash].[ext]',
      test: /([^/]+)\/(.+)\.png$/
    }
  ], options)
]

force

webpack.config.js

[
  new CopyWebpackPlugin([
    { from: 'src/**/*', to: 'dest/', force: true }
  ], options)
]

ignore

webpack.config.js

[
  new CopyWebpackPlugin([
    { from: 'src/**/*', to: 'dest/', ignore: [ '*.js' ] }
  ], options)
]

flatten

webpack.config.js

[
  new CopyWebpackPlugin([
    { from: 'src/**/*', to: 'dest/', flatten: true }
  ], options)
]

transform

{Function}

webpack.config.js

[
  new CopyWebpackPlugin([
    {
      from: 'src/*.png',
      to: 'dest/',
      transform (content, path) {
        return optimize(content)
      }
    }
  ], options)
]

{Promise}

webpack.config.js

[
  new CopyWebpackPlugin([
    {
      from: 'src/*.png',
      to: 'dest/',
      transform (content, path) {
        return Promise.resolve(optimize(content))
      }
  }
  ], options)
]

transformPath

{Function}

webpack.config.js

[
  new CopyWebpackPlugin([
    {
      from: 'src/*.png',
      to: 'dest/',
      transformPath (targetPath, absolutePath) {
        return 'newPath';
      }
    }
  ], options)
]

{Promise}

webpack.config.js

[
  new CopyWebpackPlugin([
    {
      from: 'src/*.png',
      to: 'dest/',
      transform (targePath, absolutePath) {
        return Promise.resolve('newPath')
      }
  }
  ], options)
]

cache

webpack.config.js

[
  new CopyWebpackPlugin([
    {
      from: 'src/*.png',
      to: 'dest/',
      transform (content, path) {
        return optimize(content)
      },
      cache: true
    }
  ], options)
]

context

webpack.config.js

[
  new CopyWebpackPlugin([
    { from: 'src/*.txt', to: 'dest/', context: 'app/' }
  ], options)
]

Options

Name Type Default Description
debug {String} 'warning' Debug Options
ignore {Array} [] Array of globs to ignore (applied to from)
context {String} compiler.options.context A path that determines how to interpret the from path, shared for all patterns
copyUnmodified {Boolean} false Copies files, regardless of modification when using watch or webpack-dev-server. All files are copied on first build, regardless of this option

debug

Name Type Default Description
'info' {String|Boolean} false File location and read info
'debug' {String} false Very detailed debugging info
'warning' {String} true Only warnings

'info'

webpack.config.js

[
  new CopyWebpackPlugin(
    [ ...patterns ],
    { debug: 'info' }
  )
]

'debug'

webpack.config.js

[
  new CopyWebpackPlugin(
    [ ...patterns ],
    { debug: 'debug' }
  )
]

'warning' (default)

webpack.config.js

[
  new CopyWebpackPlugin(
    [ ...patterns ],
    { debug: true }
  )
]

ignore

webpack.config.js

[
  new CopyWebpackPlugin(
    [ ...patterns ],
    { ignore: [ '*.js', '*.css' ] }
  )
]

context

webpack.config.js

[
  new CopyWebpackPlugin(
    [ ...patterns ],
    { context: '/app' }
  )
]

copyUnmodified

By default, we only copy modified files during a webpack --watch or webpack-dev-server build. Setting this option to true will copy all files.

webpack.config.js

[
  new CopyWebpackPlugin(
    [ ...patterns ],
    { copyUnmodified: true }
  )
]

Maintainers


Juho Vepsäläinen

Joshua Wiens

Michael Ciniawsky

Alexander Krasnoyarov