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# copy-webpack-plugin
Copies individual files or entire directories, which already exist, to the build directory.
## Getting Started
To begin, you'll need to install `copy-webpack-plugin`:
```console
$ npm install copy-webpack-plugin --save-dev
```
Then add the plugin to your `webpack` config. For example:
**webpack.config.js**
```js
const CopyPlugin = require('copy-webpack-plugin');
module.exports = {
plugins: [
new CopyPlugin([
{ from: 'source', to: 'dest' },
{ from: 'other', to: 'public' },
]),
],
};
```
> ℹ️ `webpack-copy-plugin` is not designed to copy files generated from the build process; rather, it is to copy files that already exist in the source tree, as part of the build process.
> ℹ️ If you want `webpack-dev-server` to write files to the output directory during development, you can force it with the [`writeToDisk`](https://github.com/webpack/webpack-dev-middleware#writetodisk) option or the [`write-file-webpack-plugin`](https://github.com/gajus/write-file-webpack-plugin).
## Options
The plugin's signature:
**webpack.config.js**
```js
module.exports = {
plugins: [new CopyPlugin(patterns, options)],
};
```
### Patterns
| Name | Type | Default | Description |
| :-------------------------------: | :-----------------: | :---------------------------------------------: | :---------------------------------------------------------------------------------------------------- |
| [`from`](#from) | `{String\|Object}` | `undefined` | Glob or path from where we сopy files. |
| [`to`](#to) | `{String}` | `compiler.options.output` | Output path. |
| [`context`](#context) | `{String}` | `options.context \|\| compiler.options.context` | A path that determines how to interpret the `from` path. |
| [`toType`](#totype) | `{String}` | `undefined` | Determinate what is `to` option - directory, file or template. |
| [`test`](#test) | `{String\|RegExp}` | `undefined` | Pattern for extracting elements to be used in `to` templates. |
| [`force`](#force) | `{Boolean}` | `false` | Overwrites files already in `compilation.assets` (usually added by other plugins/loaders). |
| [`ignore`](#ignore) | `{Array}` | `[]` | Globs to ignore files. |
| [`flatten`](#flatten) | `{Boolean}` | `false` | Removes all directory references and only copies file names. |
| [`cache`](#cache) | `{Boolean\|Object}` | `false` | Enable `transform` caching. You can use `{ cache: { key: 'my-cache-key' } }` to invalidate the cache. |
| [`transform`](#transform) | `{Function}` | `undefined` | Allows to modify the file contents. |
| [`transformPath`](#transformpath) | `{Function}` | `undefined` | Allows to modify the writing path. |
#### `from`
Type: `String|Object`
Default: `undefined`
Glob or path from where we сopy files.
Globs accept [minimatch options](https://github.com/isaacs/minimatch).
You can define `from` as `Object` and use the [`node-glob` options](https://github.com/isaacs/node-glob#options).
> ⚠️ Don't use directly `\\` in `from` (i.e `path\to\file.ext`) option because on UNIX the backslash is a valid character inside a path component, i.e., it's not a separator.
> On Windows, the forward slash and the backward slash are both separators.
> Instead please use `/` or `path` methods.
**webpack.config.js**
```js
module.exports = {
plugins: [
new CopyPlugin([
'relative/path/to/file.ext',
'/absolute/path/to/file.ext',
'relative/path/to/dir',
'/absolute/path/to/dir',
'**/*',
{
from: '**/*',
globOptions: {
dot: false,
},
},
]),
],
};
```
#### `to`
Type: `String`
Default: `compiler.options.output`
Output path.
> ⚠️ Don't use directly `\\` in `to` (i.e `path\to\dest`) option because on UNIX the backslash is a valid character inside a path component, i.e., it's not a separator.
> On Windows, the forward slash and the backward slash are both separators.
> Instead please use `/` or `path` methods.
**webpack.config.js**
```js
module.exports = {
plugins: [
new CopyPlugin([
{
from: '**/*',
to: 'relative/path/to/dest/',
},
{
from: '**/*',
to: '/absolute/path/to/dest/',
},
{
from: '**/*',
to: '[path][name].[contenthash].[ext]',
},
]),
],
};
```
#### `context`
Type: `String`
Default: `options.context|compiler.options.context`
A path that determines how to interpret the `from` path.
> ⚠️ Don't use directly `\\` in `context` (i.e `path\to\context`) option because on UNIX the backslash is a valid character inside a path component, i.e., it's not a separator.
> On Windows, the forward slash and the backward slash are both separators.
> Instead please use `/` or `path` methods.
**webpack.config.js**
```js
module.exports = {
plugins: [
new CopyPlugin([
{
from: 'src/*.txt',
to: 'dest/',
context: 'app/',
},
]),
],
};
```
#### `toType`
Type: `String`
Default: `undefined`
Determinate what is `to` option - directory, file or template.
Sometimes it is hard to say what is `to`, example `path/to/dir-with.ext`.
If you want to copy files in directory you need use `dir` option.
We try to automatically determine the `type` so you most likely do not need this option.
| 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](https://github.com/webpack-contrib/file-loader#placeholders) |
##### `'dir'`
**webpack.config.js**
```js
module.exports = {
plugins: [
new CopyPlugin([
{
from: 'path/to/file.txt',
to: 'directory/with/extension.ext',
toType: 'dir',
},
]),
],
};
```
##### `'file'`
**webpack.config.js**
```js
module.exports = {
plugins: [
new CopyPlugin([
{
from: 'path/to/file.txt',
to: 'file/without/extension',
toType: 'file',
},
]),
],
};
```
##### `'template'`
**webpack.config.js**
```js
module.exports = {
plugins: [
new CopyPlugin([
{
from: 'src/',
to: 'dest/[name].[hash].[ext]',
toType: 'template',
},
]),
],
};
```
#### `test`
Type: `string|RegExp`
Default: `undefined`
Pattern for extracting elements to be used in `to` templates.
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**
```js
module.exports = {
plugins: [
new CopyPlugin([
{
from: '*/*',
to: '[1]-[2].[hash].[ext]',
test: /([^/]+)\/(.+)\.png$/,
},
]),
],
};
```
#### `force`
Type: `Boolean`
Default: `false`
Overwrites files already in `compilation.assets` (usually added by other plugins/loaders).
**webpack.config.js**
```js
module.exports = {
plugins: [
new CopyPlugin([
{
from: 'src/**/*',
to: 'dest/',
force: true,
},
]),
],
};
```
#### `ignore`
Type: `Array`
Default: `[]`
Globs to ignore files.
**webpack.config.js**
```js
module.exports = {
plugins: [
new CopyPlugin([
{
from: 'src/**/*',
to: 'dest/',
ignore: ['*.js'],
},
]),
],
};
```
> ⚠️ Note that only relative path should be provided to ignore option, an example to ignore `src/assets/subfolder/ignorfile.js` :
**webpack.config.js**
```js
module.exports = {
plugins: [
new CopyPlugin([
{
from: 'src/assets',
to: 'dest/',
ignore: ['subfolder/ingorefile.js'],
},
]),
],
};
```
#### `flatten`
Type: `Boolean`
Default: `false`
Removes all directory references and only copies file names.
> ⚠️ If files have the same name, the result is non-deterministic.
**webpack.config.js**
```js
module.exports = {
plugins: [
new CopyPlugin([
{
from: 'src/**/*',
to: 'dest/',
flatten: true,
},
]),
],
};
```
#### `cache`
Type: `Boolean|Object`
Default: `false`
Enable/disable `transform` caching. You can use `{ cache: { key: 'my-cache-key' } }` to invalidate the cache.
Default path to cache directory: `node_modules/.cache/copy-webpack-plugin`.
**webpack.config.js**
```js
module.exports = {
plugins: [
new CopyPlugin([
{
from: 'src/*.png',
to: 'dest/',
transform(content, path) {
return optimize(content);
},
cache: true,
},
]),
],
};
```
#### `transform`
Type: `Function`
Default: `undefined`
Allows to modify the file contents.
**webpack.config.js**
```js
module.exports = {
plugins: [
new CopyPlugin([
{
from: 'src/*.png',
to: 'dest/',
transform(content, path) {
return optimize(content);
},
},
]),
],
};
```
**webpack.config.js**
```js
module.exports = {
plugins: [
new CopyPlugin([
{
from: 'src/*.png',
to: 'dest/',
transform(content, path) {
return Promise.resolve(optimize(content));
},
},
]),
],
};
```
#### `transformPath`
Type: `Function`
Default: `undefined`
Allows to modify the writing path.
> ⚠️ Don't return directly `\\` in `transformPath` (i.e `path\to\newFile`) option because on UNIX the backslash is a valid character inside a path component, i.e., it's not a separator.
> On Windows, the forward slash and the backward slash are both separators.
> Instead please use `/` or `path` methods.
**webpack.config.js**
```js
module.exports = {
plugins: [
new CopyPlugin([
{
from: 'src/*.png',
to: 'dest/',
transformPath(targetPath, absolutePath) {
return 'newPath';
},
},
]),
],
};
```
**webpack.config.js**
```js
module.exports = {
plugins: [
new CopyPlugin([
{
from: 'src/*.png',
to: 'dest/',
transformPath(targetPath, absolutePath) {
return Promise.resolve('newPath');
},
},
]),
],
};
```
### Options
| Name | Type | Default | Description |
| :---------------------------------: | :---------: | :------------------------: | :------------------------------------------------------------------------------------------------------------------------------------------------ |
| [`logLevel`](#loglevel) | `{String}` | **`'warn'`** | Level of messages that the module will log |
| [`ignore`](#ignore) | `{Array}` | `[]` | Array of globs to ignore (applied to `from`) |
| [`context`](#context) | `{String}` | `compiler.options.context` | A path that determines how to interpret the `from` path, shared for all patterns |
| [`copyUnmodified`](#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 |
#### `logLevel`
This property defines the level of messages that the module will log. Valid levels include:
- `trace`
- `debug`
- `info`
- `warn` (default)
- `error`
- `silent`
Setting a log level means that all other levels below it will be visible in the
console. Setting `logLevel: 'silent'` will hide all console output. The module
leverages [`webpack-log`](https://github.com/webpack-contrib/webpack-log#readme)
for logging management, and more information can be found on its page.
**webpack.config.js**
```js
module.exports = {
plugins: [new CopyPlugin([...patterns], { logLevel: 'debug' })],
};
```
#### `ignore`
Array of globs to ignore (applied to `from`).
**webpack.config.js**
```js
module.exports = {
plugins: [new CopyPlugin([...patterns], { ignore: ['*.js', '*.css'] })],
};
```
#### `context`
A path that determines how to interpret the `from` path, shared for all patterns.
**webpack.config.js**
```js
module.exports = {
plugins: [new CopyPlugin([...patterns], { context: '/app' })],
};
```
#### `copyUnmodified`
Copies files, regardless of modification when using watch or `webpack-dev-server`. All files are copied on first build, regardless of this option.
> ℹ️ 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**
```js
module.exports = {
plugins: [new CopyPlugin([...patterns], { copyUnmodified: true })],
};
```
## Contributing
Please take a moment to read our contributing guidelines if you haven't yet done so.
[CONTRIBUTING](./.github/CONTRIBUTING.md)
## License
[MIT](./LICENSE)
[npm]: https://img.shields.io/npm/v/copy-webpack-plugin.svg
[npm-url]: https://npmjs.com/package/copy-webpack-plugin
[node]: https://img.shields.io/node/v/copy-webpack-plugin.svg
[node-url]: https://nodejs.org
[deps]: https://david-dm.org/webpack-contrib/copy-webpack-plugin.svg
[deps-url]: https://david-dm.org/webpack-contrib/copy-webpack-plugin
[tests]: https://dev.azure.com/webpack-contrib/copy-webpack-plugin/_apis/build/status/webpack-contrib.copy-webpack-plugin?branchName=master
[tests-url]: https://dev.azure.com/webpack-contrib/copy-webpack-plugin/_build/latest?definitionId=5&branchName=master
[cover]: https://codecov.io/gh/webpack-contrib/copy-webpack-plugin/branch/master/graph/badge.svg
[cover-url]: https://codecov.io/gh/webpack-contrib/copy-webpack-plugin
[chat]: https://img.shields.io/badge/gitter-webpack%2Fwebpack-brightgreen.svg
[chat-url]: https://gitter.im/webpack/webpack
[size]: https://packagephobia.now.sh/badge?p=copy-webpack-plugin
[size-url]: https://packagephobia.now.sh/result?p=copy-webpack-plugin