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This repository was archived by the owner on Dec 5, 2019. It is now read-only.
<p>This plugin uses <a href="https://github.com/mishoo/UglifyJS2/tree/v2.x">UglifyJS v2</a> to minify your JavaScript.<p>
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<p>This plugin uses <a href="https://github.com/mishoo/UglifyJS2/tree/master">UglifyJS v3</a> to minify your JavaScript<p>
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</div>
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> Note that webpack contains the same plugin under `webpack.optimize.UglifyJsPlugin`. This is a standalone version for those that want to control the version of UglifyJS. The documentation is valid apart from the installation instructions in that case.
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> ℹ️ webpack contains the same plugin under `webpack.optimize.UglifyJsPlugin`. The documentation is valid apart from the installation instructions
| output | An object providing options for UglifyJS [OutputStream](https://github.com/mishoo/UglifyJS2/blob/v2.x/lib/output.js)|| Lower level access to UglifyJS output. |
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| comments | boolean, RegExp, function(astNode, comment) -> boolean | Defaults to preserving comments containing `/*!`, `/**!`, `@preserve` or `@license`. | Comment related configuration. |
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| extractComments | boolean, RegExp, function (astNode, comment) -> boolean, object | false | Whether comments shall be extracted to a separate file, (see [details](https://github.com/webpack/webpack/commit/71933e979e51c533b432658d5e37917f9e71595a), since webpack 2.3.0) |
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| sourceMap | boolean | false | Use SourceMaps to map error message locations to modules. This slows down the compilation. **Important!**`cheap` source map options don't work with the plugin! |
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| test | RegExp, Array<RegExp> | <code>/\.js($|\?)/i</code> | Test to match files against. |
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| include | RegExp, Array<RegExp> || Test only `include` files. |
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| exclude | RegExp, Array<RegExp> || Files to `exclude` from testing. |
`mangle (boolean|object)` - Passing `true` or an object enables and provides options for UglifyJS name mangling. See [UglifyJS documentation](https://github.com/mishoo/UglifyJS2/tree/v2.x#mangle) for mangle options. Example configuration, this will **not** mangle properties (see below):
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```javascript
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newUglifyJsPlugin({
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mangle: {
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// Skip mangling these
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except: ['$super', '$', 'exports', 'require']
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}
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})
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|Name|Type|Default|Description|
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|:--:|:--:|:-----:|:----------|
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|**`test`**|`{RegExp\|Array<RegExp>}`| <code>/\.js($|\?)/i</code>|Test to match files against|
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|**`include`**|`{RegExp\|Array<RegExp>}`|`undefined`|Files to `include`|
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|**`exclude`**|`{RegExp\|Array<RegExp>}`|`undefined`|Files to `exclude`|
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|**`sourceMap`**|`{Boolean}`|`false`|Use SourceMaps to map error message locations to modules (This slows down the compilation) ⚠️ **`cheap-source-map` options don't work with this plugin**|
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|**`parallel`**|`{Boolean\|Object}`|`false`|Use multi-process parallel running and file cache to improve the build speed|
|**`extractComments`**|`{Boolean\|RegExp\|Function<(node, comment) -> {Boolean\|Object}>}`|`false`|Whether comments shall be extracted to a separate file, (see [details](https://github.com/webpack/webpack/commit/71933e979e51c533b432658d5e37917f9e71595a) (`webpack >= 2.3.0`)|
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|**`warningsFilter`**|`{Function(source) -> {Boolean}}`|``|Allow to filter uglify warnings|
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### `test`
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**webpack.config.js**
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```js
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[
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newUglifyJSPlugin({
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test:/\.js($|\?)/i
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})
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]
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```
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### `include`
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**webpack.config.js**
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```js
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[
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newUglifyJSPlugin({
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include:/\/includes/
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})
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]
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```
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### `exclude`
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**webpack.config.js**
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```js
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[
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newUglifyJSPlugin({
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exclude:/\/excludes/
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})
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]
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```
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`mangle.props (boolean|object)` - Passing `true` or an object enables and provides options for UglifyJS property mangling - see [UglifyJS documentation](https://github.com/mishoo/UglifyJS2/tree/v2.x#mangleproperties-options) for mangleProperties options.
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### `sourceMap`
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> Note: the UglifyJS docs warn that [you will probably break your source if you use property mangling](https://github.com/mishoo/UglifyJS2/tree/v2.x#mangling-property-names---mangle-props), so if you aren’t sure why you’d need this feature, you most likely shouldn’t be using it! This is **not** enabled by default.
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**webpack.config.js**
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```js
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[
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newUglifyJSPlugin({
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sourceMap:true
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})
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]
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```
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> ⚠️ **`cheap-source-map` options don't work with this plugin**
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Example configuration, this will mangle both names and properties:
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### `parallel`
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```javascript
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newUglifyJsPlugin({
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mangle: {
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props:true
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}
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})
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Enables parallelization (multi-process) with file caching
|**[`mangle`](https://github.com/mishoo/UglifyJS2/tree/master#mangle-options)**|`{Boolean\|Object}`|`true`|Enable Name Mangling (See [Mangle Properties](https://github.com/mishoo/UglifyJS2/tree/master#mangle-properties-options) for advanced setups, use with ⚠️)|
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|**[`output`](https://github.com/mishoo/UglifyJS2/tree/master#output-options)**|`{Object}`|`{}`|Additional Output Options (The defaults are optimized for best compression)|
-`true`: All comments that normally would be preserved by the `comments` option will be moved to a separate file. If the original file is named `foo.js`, then the comments will be stored to `foo.js.LICENSE`
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- regular expression (given as `RegExp` or `string`) or a `function (astNode, comment) -> boolean`:
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All comments that match the given expression (resp. are evaluated to `true` by the function) will be extracted to the separate file. The `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.
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- an `object` consisting of the following keys, all optional:
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-`condition`: regular expression or function (see previous point)
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-`filename`: The file where the extracted comments will be stored. Can be either a `string` or `function (string) -> string` which will be given the original filename. Default is to append the suffix `.LICENSE` to the original filename.
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-`banner`: The banner text that points to the extracted file and will be added on top of the original file. will be added to 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.
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Default: `/*! For license information please see foo.js.LICENSE */`
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