Miss any of our Open RFC calls?Watch the recordings here! »


1.3.1 • Public • Published

micromatch NPM version Build Status

Glob matching for javascript/node.js. A faster alternative to minimatch (10-45x faster on avg), with all the features you're used to using in your Grunt and gulp tasks.

  • 10-45x faster than [minimatch] on average (see benchmarks)
  • Focus on core Bash 4.3 specification features that are actually used (or can be used) in node.js
  • Supports passing glob patterns as a string or array
  • Extensive unit tests



All the mainstream glob features you're used to using in your gulp and Grunt tasks:

  • Brace Expansion (foo/bar-{1..5}.md, one/{two,three}/four.md)
  • Typical glob patterns (**/*, a/b/*.js, etc)
  • Logical OR (foo/bar/(abc|xyz).js)
  • Regex character classes (foo/bar/baz-[1-5].js)
  • POSIX bracket expressions (**/[:alpha:][:digit:]/)
  • extglobs (**/+(x|y), !(a|b), etc)

You can combine these to create whatever matching patterns you need.

Install with npm

npm i micromatch --save


var mm = require('micromatch');
mm(['a.js', 'b.md', 'c.txt'], '*.{js,txt}');
//=> ['a.js', 'c.txt']

Multiple patterns

Multiple patterns can also be passed:

mm(['a.md', 'b.js', 'c.txt', 'd.json'], ['*.md', '*.txt']);
//=> ['a.md', 'c.txt']

Negation patterns:

mm(['a.js', 'b.md', 'c.txt'], '!*.{js,txt}');
//=> ['b.md']
mm(['a.md', 'b.js', 'c.txt', 'd.json'], ['*.*', '!*.{js,txt}']);
//=> ['a.md', 'd.json']

Special characters

With the exception of brace expansion ({a,b}, {1..5}, etc), most of the special characters convert directly to regex, so you can expect them to follow the same rules and produce the same results as regex.

Square brackets

Given ['a.js', 'b.js', 'c.js', 'd.js', 'E.js']:

  • [ac].js: matches both a and c, returning ['a.js', 'c.js']
  • [b-d].js: matches from b to d, returning ['b.js', 'c.js', 'd.js']
  • [b-d].js: matches from b to d, returning ['b.js', 'c.js', 'd.js']
  • a/[A-Z].js: matches and uppercase letter, returning ['a/E.md']

Learn about regex character classes.


Given ['a.js', 'b.js', 'c.js', 'd.js', 'E.js']:

  • (a|c).js: would match either a or c, returning ['a.js', 'c.js']
  • (b|d).js: would match either b or d, returning ['b.js', 'd.js']
  • (b|[A-Z]).js: would match either b or an uppercase letter, returning ['b.js', 'E.js']

As with regex, parenthese can be nested, so patterns like ((a|b)|c)/b will work. But it might be easier to achieve your goal using brace expansion.

Brace Expansion

In simple cases, brace expansion appears to work the same way as the logical OR operator. For example, (a|b) will achieve the same result as {a,b}.

Here are some powerful features unique to brace expansion (versus character classes):

  • range expansion: a{1..3}b/*.js expands to: ['a1b/*.js', 'a2b/*.js', 'a3b/*.js']
  • nesting: a{c,{d,e}}b/*.js expands to: ['acb/*.js', 'adb/*.js', 'aeb/*.js']

Learn about brace expansion, or visit braces to ask questions and create an issue related to brace-expansion, or to see the full range of features and options related to brace expansion.


var mm = require('micromatch');


Returns true if a file path matches the given glob pattern.


mm.isMatch('.verb.md', '*.md');
//=> false
mm.isMatch('.verb.md', '*.md', {dot: true});
//=> true


Returns true if a file path contains a match for the given glob pattern.


mm.contains('a/b/c', 'a/b');
//=> true
mm.contains('a/b/c', 'a/*');
//=> true


Returns a function for filtering files with the given pattern.


var fn = mm.filter('*.md', {dot: true});
['a.js', 'b.txt', 'c.md', '.verb.md'].filter(fn);
//=> ['c.md', '.verb.md']


Returns an object with a regex-compatible string and tokens.

// results in:
// { glob: '(?!\\.)(?=.)[^/]*?\\.js',
//   tokens:
//    { pattern: '*.js',
//      dirname: '',
//      filename: '*.js',
//      basename: '*',
//      extname: '.js',
//      isDotGlob: false },
//   options: {} }


Create a regular expression for matching file paths based on the given pattern:

//=> /^(?:(?!\.)(?=.)[^/]*?\.js)$/


All options should work the same way as [minimatch].


Match dotfiles.

Type: {Boolean}

Default: false


Allow glob patterns without slashes to match a file path based on its basename.

Type: {Boolean}

Default: false


mm(['a/b.js', 'a/c.md'], '*.js');
//=> []
mm(['a/b.js', 'a/c.md'], '*.js', {matchBase: true});
//=> ['a/b.js']


Don't expand braces in glob patterns.

Type: {Boolean}

Default: false


Use a case-insensitive regex for matching files.

Type: {Boolean}

Default: false


If true, when no matches are found the actual (array-ified) glob pattern is returned instead of an empty array.

Type: {Boolean}

Default: false


Cache the platform (e.g. win32) to prevent this from being looked up for every fil.

Type: {Boolean}

Default: true


Run the benchmarks:

npm run benchmark

As of February 11, 2015:

#1: basename-braces.js 
  micromatch.js x 25,776 ops/sec ±0.68% (98 runs sampled)
  minimatch.js x 3,335 ops/sec ±1.09% (98 runs sampled)
#2: basename.js 
  micromatch.js x 24,676 ops/sec ±0.56% (95 runs sampled)
  minimatch.js x 4,908 ops/sec ±0.95% (97 runs sampled)
#3: braces-no-glob.js 
  micromatch.js x 473,492 ops/sec ±0.64% (96 runs sampled)
  minimatch.js x 27,705 ops/sec ±1.78% (91 runs sampled)
#4: braces.js 
  micromatch.js x 42,522 ops/sec ±0.63% (97 runs sampled)
  minimatch.js x 3,995 ops/sec ±1.36% (95 runs sampled)
#5: immediate.js 
  micromatch.js x 24,048 ops/sec ±0.72% (95 runs sampled)
  minimatch.js x 4,786 ops/sec ±1.40% (95 runs sampled)
#6: large.js 
  micromatch.js x 773 ops/sec ±0.62% (98 runs sampled)
  minimatch.js x 27.52 ops/sec ±0.66% (49 runs sampled)
#7: long.js 
  micromatch.js x 7,388 ops/sec ±0.64% (99 runs sampled)
  minimatch.js x 608 ops/sec ±0.95% (95 runs sampled)
#8: mid.js 
  micromatch.js x 41,193 ops/sec ±0.74% (99 runs sampled)
  minimatch.js x 2,724 ops/sec ±1.09% (97 runs sampled)
#9: multi-patterns.js 
  micromatch.js x 12,909 ops/sec ±0.71% (93 runs sampled)
  minimatch.js x 2,798 ops/sec ±1.45% (95 runs sampled)
#10: no-glob.js 
  micromatch.js x 430,787 ops/sec ±0.66% (98 runs sampled)
  minimatch.js x 47,222 ops/sec ±2.19% (86 runs sampled)
#11: range.js 
  micromatch.js x 474,561 ops/sec ±0.69% (97 runs sampled)
  minimatch.js x 10,819 ops/sec ±2.20% (88 runs sampled)
#12: shallow.js 
  micromatch.js x 239,098 ops/sec ±0.67% (96 runs sampled)
  minimatch.js x 27,782 ops/sec ±2.12% (92 runs sampled)
#13: short.js 
  micromatch.js x 707,905 ops/sec ±0.97% (97 runs sampled)
  minimatch.js x 52,171 ops/sec ±2.45% (84 runs sampled)

Run tests

Install dev dependencies

npm i -d && npm test


Pull requests and stars are always welcome. For bugs and feature requests, please create an issue

Please be sure to run the benchmarks before/after any code changes to judge the impact before you do a PR. thanks!


Jon Schlinkert


Copyright (c) 2014-2015 Jon Schlinkert
Released under the MIT license

This file was generated by verb on February 11, 2015.


npm i [email protected]





Last publish


  • avatar
  • avatar
  • avatar