gulp-uglify

Minify JavaScript with UglifyJS2.

Installation

Install package with NPM and add it to your development dependencies:

npm install --save-dev gulp-uglify

var uglify = require('gulp-uglify');

gulp.task('compress', function() {
  gulp.src('lib/*.js')
    .pipe(uglify())
    .pipe(gulp.dest('dist'))
});

mangle

Pass false to skip mangling names.
output

Pass an object if you wish to specify additional output options. The defaults are optimized for best compression.
compress

Pass an object to specify custom compressor options. Pass false to skip compression completely.
preserveComments

A convenience option for options.output.comments. Defaults to preserving no comments.
- all
  
  Preserve all comments in code blocks
- some
  
  Preserve comments that start with a bang (!) or include a Closure Compiler directive (@preserve, @license, @cc_on)
- function
  
  Specify your own comment preservation function. You will be passed the current node and the current comment and are expected to return either true or false.

You can also pass the uglify function any of the options listed here to modify UglifyJS's behavior.