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Minify JavaScript with terser.

Build Status NPM version


The latest version of gulp-minify is using terser to minify files, this may cause some incompatible issues with earlier language versions for now, see

So gulp-minify@es5 is for the earlier language versions if your project is not ready for the ECMAScript 6 yet.


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

npm install --save-dev gulp-minify


Basic usage: the following minifies every *.js and *.mjs files to *-min.js and *-min.mjs respectively. Note that the original files are preserved.

const minify = require('gulp-minify');

gulp.task('compress', function() {
  gulp.src(['lib/*.js', 'lib/*.mjs'])

Options can be added to control more finely what's happening, for example:

const minify = require('gulp-minify');

gulp.task('compress', function() {
        exclude: ['tasks'],
        ignoreFiles: ['.combo.js', '-min.js']


  • ext An object that specifies output src and minified file extensions.

    • src

      The suffix string of the filenames that output source files ends with.

    • min

      • When string: The suffix string of the filenames that output minified files ends with.
      • When Array: The regex expressions to be replaced with input filenames. For example: [/\.(.*)-source\.js$/, '$1.js']
  • exclude

    Will not minify files in the dirs.

  • noSource Will not output the source code in the dest dirs.

  • ignoreFiles

    Will not minify files which matches the pattern.

  • 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.