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https://github.com/webpack-contrib/uglifyjs-webpack-plugin
[deprecated] UglifyJS Plugin
https://github.com/webpack-contrib/uglifyjs-webpack-plugin
minify minimizer uglify webpack webpack-plugin
Last synced: 3 months ago
JSON representation
[deprecated] UglifyJS Plugin
- Host: GitHub
- URL: https://github.com/webpack-contrib/uglifyjs-webpack-plugin
- Owner: webpack-contrib
- License: mit
- Archived: true
- Created: 2017-01-21T09:49:17.000Z (almost 8 years ago)
- Default Branch: master
- Last Pushed: 2019-12-05T12:01:04.000Z (about 5 years ago)
- Last Synced: 2024-09-25T13:52:08.151Z (3 months ago)
- Topics: minify, minimizer, uglify, webpack, webpack-plugin
- Language: JavaScript
- Homepage:
- Size: 1.38 MB
- Stars: 1,382
- Watchers: 30
- Forks: 180
- Open Issues: 4
-
Metadata Files:
- Readme: README.md
- Changelog: CHANGELOG.md
- Contributing: .github/CONTRIBUTING.md
- Funding: .github/FUNDING.yml
- License: LICENSE
- Codeowners: .github/CODEOWNERS
Awesome Lists containing this project
- awesome-f2e-libs - **uglifyjs-webpack-plugin** - JS 压缩，产物为 ES5 语法。 (打包工具 / webpack 辅助工具、Loader 和插件)
- awesome-fe - **uglifyjs-webpack-plugin** - JS 压缩，产物为 ES5 语法。 (打包工具 / webpack 辅助工具、Loader 和插件)
README
# DEPRECATED
Please use https://github.com/webpack-contrib/terser-webpack-plugin
[![npm][npm]][npm-url]
[![node][node]][node-url]
[![deps][deps]][deps-url]
[![tests][tests]][tests-url]
[![cover][cover]][cover-url]
[![chat][chat]][chat-url]
[![size][size]][size-url]
# UglifyJS Webpack Plugin
This plugin uses [uglify-js](https://github.com/mishoo/UglifyJS2) to minify your JavaScript.
## Requirements
This module requires a minimum of Node v6.9.0 and Webpack v4.0.0.
## Getting Started
To begin, you'll need to install `uglifyjs-webpack-plugin`:
```console
$ npm install uglifyjs-webpack-plugin --save-dev
```
Then add the plugin to your `webpack` config. For example:
**webpack.config.js**
```js
const UglifyJsPlugin = require('uglifyjs-webpack-plugin');
module.exports = {
optimization: {
minimizer: [new UglifyJsPlugin()],
},
};
```
And run `webpack` via your preferred method.
## Options
### `test`
Type: `String|RegExp|Array`
Default: `/\.js(\?.*)?$/i`
Test to match files against.
**webpack.config.js**
```js
module.exports = {
optimization: {
minimizer: [
new UglifyJsPlugin({
test: /\.js(\?.*)?$/i,
}),
],
},
};
```
### `include`
Type: `String|RegExp|Array`
Default: `undefined`
Files to include.
**webpack.config.js**
```js
module.exports = {
optimization: {
minimizer: [
new UglifyJsPlugin({
include: /\/includes/,
}),
],
},
};
```
### `exclude`
Type: `String|RegExp|Array`
Default: `undefined`
Files to exclude.
**webpack.config.js**
```js
module.exports = {
optimization: {
minimizer: [
new UglifyJsPlugin({
exclude: /\/excludes/,
}),
],
},
};
```
### `chunkFilter`
Type: `Function<(chunk) -> boolean>`
Default: `() => true`
Allowing to filter which chunks should be uglified (by default all chunks are uglified).
Return `true` to uglify the chunk, `false` otherwise.
**webpack.config.js**
```js
module.exports = {
optimization: {
minimizer: [
new UglifyJsPlugin({
chunkFilter: (chunk) => {
// Exclude uglification for the `vendor` chunk
if (chunk.name === 'vendor') {
return false;
}
return true;
},
}),
],
},
};
```
### `cache`
Type: `Boolean|String`
Default: `false`
Enable file caching.
Default path to cache directory: `node_modules/.cache/uglifyjs-webpack-plugin`.
> ℹ️ If you use your own `minify` function please read the `minify` section for cache invalidation correctly.
#### `Boolean`
Enable/disable file caching.
**webpack.config.js**
```js
module.exports = {
optimization: {
minimizer: [
new UglifyJsPlugin({
cache: true,
}),
],
},
};
```
#### `String`
Enable file caching and set path to cache directory.
**webpack.config.js**
**webpack.config.js**
```js
module.exports = {
optimization: {
minimizer: [
new UglifyJsPlugin({
cache: 'path/to/cache',
}),
],
},
};
```
### `cacheKeys`
Type: `Function<(defaultCacheKeys, file) -> Object>`
Default: `defaultCacheKeys => defaultCacheKeys`
Allows you to override default cache keys.
Default cache keys:
```js
({
'uglify-js': require('uglify-js/package.json').version, // uglify version
'uglifyjs-webpack-plugin': require('../package.json').version, // plugin version
'uglifyjs-webpack-plugin-options': this.options, // plugin options
path: compiler.outputPath ? `${compiler.outputPath}/${file}` : file, // asset path
hash: crypto
.createHash('md4')
.update(input)
.digest('hex'), // source file hash
});
```
**webpack.config.js**
```js
module.exports = {
optimization: {
minimizer: [
new UglifyJsPlugin({
cache: true,
cacheKeys: (defaultCacheKeys, file) => {
defaultCacheKeys.myCacheKey = 'myCacheKeyValue';
return defaultCacheKeys;
},
}),
],
},
};
```
### `parallel`
Type: `Boolean|Number`
Default: `false`
Use multi-process parallel running to improve the build speed.
Default number of concurrent runs: `os.cpus().length - 1`.
> ℹ️ Parallelization can speedup your build significantly and is therefore **highly recommended**.
#### `Boolean`
Enable/disable multi-process parallel running.
**webpack.config.js**
```js
module.exports = {
optimization: {
minimizer: [
new UglifyJsPlugin({
parallel: true,
}),
],
},
};
```
#### `Number`
Enable multi-process parallel running and set number of concurrent runs.
**webpack.config.js**
```js
module.exports = {
optimization: {
minimizer: [
new UglifyJsPlugin({
parallel: 4,
}),
],
},
};
```
### `sourceMap`
Type: `Boolean`
Default: `false`
Use source maps to map error message locations to modules (this slows down the compilation).
If you use your own `minify` function please read the `minify` section for handling source maps correctly.
> ⚠️ **`cheap-source-map` options don't work with this plugin**.
**webpack.config.js**
```js
module.exports = {
optimization: {
minimizer: [
new UglifyJsPlugin({
sourceMap: true,
}),
],
},
};
```
### `minify`
Type: `Function`
Default: `undefined`
Allows you to override default minify function.
By default plugin uses [uglify-js](https://github.com/mishoo/UglifyJS2) package.
Useful for using and testing unpublished versions or forks.
> ⚠️ **Always use `require` inside `minify` function when `parallel` option enabled**.
**webpack.config.js**
```js
module.exports = {
optimization: {
minimizer: [
new UglifyJsPlugin({
minify(file, sourceMap) {
const extractedComments = [];
// Custom logic for extract comments
const { error, map, code, warnings } = require('uglify-module') // Or require('./path/to/uglify-module')
.minify(file, {
/* Your options for minification */
});
return { error, map, code, warnings, extractedComments };
},
}),
],
},
};
```
### `uglifyOptions`
Type: `Object`
Default: [default](https://github.com/mishoo/UglifyJS2#minify-options)
UglifyJS minify [options](https://github.com/mishoo/UglifyJS2#minify-options).
**webpack.config.js**
```js
module.exports = {
optimization: {
minimizer: [
new UglifyJsPlugin({
uglifyOptions: {
warnings: false,
parse: {},
compress: {},
mangle: true, // Note `mangle.properties` is `false` by default.
output: null,
toplevel: false,
nameCache: null,
ie8: false,
keep_fnames: false,
},
}),
],
},
};
```
### `extractComments`
Type: `Boolean|String|RegExp|Function<(node, comment) -> Boolean|Object>`
Default: `false`
Whether comments shall be extracted to a separate file, (see [details](https://github.com/webpack/webpack/commit/71933e979e51c533b432658d5e37917f9e71595a)).
By default extract only comments using `/^\**!|@preserve|@license|@cc_on/i` regexp condition and remove remaining comments.
If the original file is named `foo.js`, then the comments will be stored to `foo.js.LICENSE`.
The `uglifyOptions.output.comments` option specifies whether the comment will be preserved, i.e. it is possible to preserve some comments (e.g. annotations) while extracting others or even preserving comments that have been extracted.
#### `Boolean`
Enable/disable extracting comments.
**webpack.config.js**
```js
module.exports = {
optimization: {
minimizer: [
new UglifyJsPlugin({
extractComments: true,
}),
],
},
};
```
#### `String`
Extract `all` or `some` (use `/^\**!|@preserve|@license|@cc_on/i` RegExp) comments.
**webpack.config.js**
```js
module.exports = {
optimization: {
minimizer: [
new UglifyJsPlugin({
extractComments: 'all',
}),
],
},
};
```
#### `RegExp`
All comments that match the given expression will be extracted to the separate file.
**webpack.config.js**
```js
module.exports = {
optimization: {
minimizer: [
new UglifyJsPlugin({
extractComments: /@extract/i,
}),
],
},
};
```
#### `Function<(node, comment) -> Boolean>`
All comments that match the given expression will be extracted to the separate file.
**webpack.config.js**
```js
module.exports = {
optimization: {
minimizer: [
new UglifyJsPlugin({
extractComments: function(astNode, comment) {
if (/@extract/i.test(comment.value)) {
return true;
}
return false;
},
}),
],
},
};
```
#### `Object`
Allow to customize condition for extract comments, specify extracted file name and banner.
**webpack.config.js**
```js
module.exports = {
optimization: {
minimizer: [
new UglifyJsPlugin({
extractComments: {
condition: /^\**!|@preserve|@license|@cc_on/i,
filename(file) {
return `${file}.LICENSE`;
},
banner(licenseFile) {
return `License information can be found in ${licenseFile}`;
},
},
}),
],
},
};
```
##### `condition`
Type: `Boolean|String|RegExp|Function<(node, comment) -> Boolean|Object>`
Condition what comments you need extract.
**webpack.config.js**
```js
module.exports = {
optimization: {
minimizer: [
new UglifyJsPlugin({
extractComments: {
condition: 'some',
filename(file) {
return `${file}.LICENSE`;
},
banner(licenseFile) {
return `License information can be found in ${licenseFile}`;
},
},
}),
],
},
};
```
##### `filename`
Type: `Regex|Function<(string) -> String>`
Default: `${file}.LICENSE`
The file where the extracted comments will be stored.
Default is to append the suffix `.LICENSE` to the original filename.
**webpack.config.js**
```js
module.exports = {
optimization: {
minimizer: [
new UglifyJsPlugin({
extractComments: {
condition: /^\**!|@preserve|@license|@cc_on/i,
filename: 'extracted-comments.js',
banner(licenseFile) {
return `License information can be found in ${licenseFile}`;
},
},
}),
],
},
};
```
##### `banner`
Type: `Boolean|String|Function<(string) -> String>`
Default: `/*! For license information please see ${commentsFile} */`
The banner text that points to the extracted file and will be added on top of the original file.
Can be `false` (no banner), a `String`, or a `Function<(string) -> String>` that will be called with the filename where extracted comments have been stored.
Will be wrapped into comment.
**webpack.config.js**
```js
module.exports = {
optimization: {
minimizer: [
new UglifyJsPlugin({
extractComments: {
condition: true,
filename(file) {
return `${file}.LICENSE`;
},
banner(commentsFile) {
return `My custom banner about license information ${commentsFile}`;
},
},
}),
],
},
};
```
### `warningsFilter`
Type: `Function<(warning, source) -> Boolean>`
Default: `() => true`
Allow to filter [uglify-js](https://github.com/mishoo/UglifyJS2) warnings.
Return `true` to keep the warning, `false` otherwise.
**webpack.config.js**
```js
module.exports = {
optimization: {
minimizer: [
new UglifyJsPlugin({
warningsFilter: (warning, source) => {
if (/Dropping unreachable code/i.test(warning)) {
return true;
}
if (/filename\.js/i.test(source)) {
return true;
}
return false;
},
}),
],
},
};
```
## Examples
### Cache And Parallel
Enable cache and multi-process parallel running.
**webpack.config.js**
```js
module.exports = {
optimization: {
minimizer: [
new UglifyJsPlugin({
cache: true,
parallel: true,
}),
],
},
};
```
### Preserve Comments
Extract all legal comments (i.e. `/^\**!|@preserve|@license|@cc_on/i`) and preserve `/@license/i` comments.
**webpack.config.js**
```js
module.exports = {
optimization: {
minimizer: [
new UglifyJsPlugin({
uglifyOptions: {
output: {
comments: /@license/i,
},
},
extractComments: true,
}),
],
},
};
```
### Remove Comments
If you avoid building with comments, set **uglifyOptions.output.comments** to **false** as in this config:
**webpack.config.js**
```js
module.exports = {
optimization: {
minimizer: [
new UglifyJsPlugin({
uglifyOptions: {
output: {
comments: false,
},
},
}),
],
},
};
```
### Custom Minify Function
Override default minify function - use [terser](https://github.com/fabiosantoscode/terser) for minification.
**webpack.config.js**
```js
module.exports = {
optimization: {
minimizer: [
new UglifyJsPlugin({
// Uncomment lines below for cache invalidation correctly
// cache: true,
// cacheKeys(defaultCacheKeys) {
// delete defaultCacheKeys['uglify-js'];
//
// return Object.assign(
// {},
// defaultCacheKeys,
// { 'uglify-js': require('uglify-js/package.json').version },
// );
// },
minify(file, sourceMap) {
// https://github.com/mishoo/UglifyJS2#minify-options
const uglifyJsOptions = {
/* your `uglify-js` package options */
};
if (sourceMap) {
uglifyJsOptions.sourceMap = {
content: sourceMap,
};
}
return require('terser').minify(file, uglifyJsOptions);
},
}),
],
},
};
```
## 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/uglifyjs-webpack-plugin.svg
[npm-url]: https://npmjs.com/package/uglifyjs-webpack-plugin
[node]: https://img.shields.io/node/v/uglifyjs-webpack-plugin.svg
[node-url]: https://nodejs.org
[deps]: https://david-dm.org/webpack-contrib/uglifyjs-webpack-plugin.svg
[deps-url]: https://david-dm.org/webpack-contrib/uglifyjs-webpack-plugin
[tests]: https://dev.azure.com/webpack-contrib/uglifyjs-webpack-plugin/_apis/build/status/webpack-contrib.uglifyjs-webpack-plugin?branchName=master
[tests-url]: https://dev.azure.com/webpack-contrib/uglifyjs-webpack-plugin/_build/latest?definitionId=8&branchName=master
[cover]: https://codecov.io/gh/webpack-contrib/uglifyjs-webpack-plugin/branch/master/graph/badge.svg
[cover-url]: https://codecov.io/gh/webpack-contrib/uglifyjs-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=uglifyjs-webpack-plugin
[size-url]: https://packagephobia.now.sh/result?p=uglifyjs-webpack-plugin