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75 lines
2.4 KiB
Markdown
75 lines
2.4 KiB
Markdown
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# gulp-uglify [](https://travis-ci.org/terinjokes/gulp-uglify) [](https://www.npmjs.org/package/gulp-uglify) [](https://www.npmjs.org/package/gulp-uglify) [](https://codeclimate.com/github/terinjokes/gulp-uglify) [](https://codeclimate.com/github/terinjokes/gulp-uglify)
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> Minify JavaScript with UglifyJS2.
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## Installation
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Install package with NPM and add it to your development dependencies:
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`npm install --save-dev gulp-uglify`
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## Usage
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```javascript
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var uglify = require('gulp-uglify');
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gulp.task('compress', function() {
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return gulp.src('lib/*.js')
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.pipe(uglify())
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.pipe(gulp.dest('dist'));
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});
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```
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## Options
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- `mangle`
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Pass `false` to skip mangling names.
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- `output`
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Pass an object if you wish to specify additional [output
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options](http://lisperator.net/uglifyjs/codegen). The defaults are
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optimized for best compression.
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- `compress`
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Pass an object to specify custom [compressor
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options](http://lisperator.net/uglifyjs/compress). Pass `false` to skip
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compression completely.
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- `preserveComments`
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A convenience option for `options.output.comments`. Defaults to preserving no
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comments.
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- `all`
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Preserve all comments in code blocks
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- `some`
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Preserve comments that start with a bang (`!`) or include a Closure
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Compiler directive (`@preserve`, `@license`, `@cc_on`)
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- `function`
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Specify your own comment preservation function. You will be passed the
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current node and the current comment and are expected to return either
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`true` or `false`.
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You can also pass the `uglify` function any of the options [listed
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here](https://github.com/mishoo/UglifyJS2#the-simple-way) to modify
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UglifyJS's behavior.
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## Errors
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`gulp-uglify` emits an 'error' event if it is unable to minify a specific file.
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Wherever popssible, the PluginError object will contain the following properties:
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- `fileName`
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- `lineNumber`
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- `message`
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To handle errors across your entire pipeline, see the
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[gulp](https://github.com/gulpjs/gulp/blob/master/docs/recipes/combining-streams-to-handle-errors.md#combining-streams-to-handle-errors) documentation.
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