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copy-webpack-plugin
Advanced tools
The copy-webpack-plugin is a webpack plugin that allows you to copy files and directories from one location to another within your build process. It is commonly used to copy static assets such as images, fonts, and HTML files to the output directory defined in your webpack configuration.
Copying individual files or entire directories
This feature allows you to copy individual files or entire directories from a specified source to a destination within your output directory. The 'from' field specifies the relative or absolute path to the source file or directory, and the 'to' field specifies the relative path to the destination within the output directory.
new CopyPlugin({ patterns: [{ from: 'source', to: 'dest' }] })
Ignoring files
This feature allows you to exclude specific files or patterns from being copied. In the provided code sample, all JavaScript files are ignored and will not be copied to the destination.
new CopyPlugin({ patterns: [{ from: 'source', to: 'dest', globOptions: { ignore: ['**/*.js'] } }] })
Adding context to file paths
This feature allows you to specify a context for the file paths. The 'context' option sets a base path for the 'from' property. In the code sample, the actual path that will be copied is 'app/source'.
new CopyPlugin({ patterns: [{ from: 'source', to: 'dest', context: 'app' }] })
Transforming file content
This feature allows you to modify the content of files before they are copied. The 'transform' function receives the content of the file and its path, and it should return the new content. This can be used to minify files, add banners, or perform other transformations.
new CopyPlugin({ patterns: [{ from: 'source', to: 'dest', transform: (content, path) => { return modifyContent(content); } }] })
The file-loader resolves import/require() on a file into a url and emits the file into the output directory. It is similar to copy-webpack-plugin in that it helps manage static assets, but it is more focused on handling assets within the module system.
The html-webpack-plugin simplifies the creation of HTML files to serve your webpack bundles. It can copy HTML files and automatically inject script tags for bundle files. It differs from copy-webpack-plugin by focusing on HTML files and their dependencies.
The assets-webpack-plugin generates a JSON file with the assets produced by webpack. It is similar to copy-webpack-plugin in that it deals with the output of assets, but it does not copy files; instead, it provides a manifest of the generated assets.
npm i -D copy-webpack-plugin
webpack.config.js
const CopyWebpackPlugin = require('copy-webpack-plugin')
const config = {
plugins: [
new CopyWebpackPlugin([ ...patterns ], options)
]
}
ℹ️ If you want
webpack-dev-server
to write files to the output directory during development, you can force it with thewrite-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 |
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)
]
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)
]
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
ℹ️ By default, we only copy modified files during a
webpack --watch
orwebpack-dev-server
build. Setting this option totrue
will copy all files.
webpack.config.js
[
new CopyWebpackPlugin(
[ ...patterns ],
{ copyUnmodified: true }
)
]
Juho Vepsäläinen |
Joshua Wiens |
Michael Ciniawsky |
Alexander Krasnoyarov |
FAQs
Copy files && directories with webpack
The npm package copy-webpack-plugin receives a total of 6,949,292 weekly downloads. As such, copy-webpack-plugin popularity was classified as popular.
We found that copy-webpack-plugin demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 3 open source maintainers collaborating on the project.
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