is-glob

What is is-glob?

The is-glob npm package is used to determine if a string is a glob pattern. A glob pattern is a string that defines a pattern for matching file names, typically used for file searching and manipulation. The package provides a simple API to check if a string contains characters that make it a valid glob pattern.

What are is-glob's main functionalities?

Check if a string is a glob pattern

This feature allows you to check if a given string is a glob pattern. It returns true if the string contains special characters like '*', '?', or '[...]' that are used in glob patterns, and false otherwise.

const isGlob = require('is-glob');

console.log(isGlob('*.js')); // true
console.log(isGlob('hello.txt')); // false

Check if an array contains a glob pattern

This feature checks if any element in an array is a glob pattern. It returns true if at least one element is a glob pattern, and false if none are.

const isGlob = require('is-glob');

console.log(isGlob(['css', '*.js'])); // true
console.log(isGlob(['css', 'js'])); // false

Other packages similar to is-glob

micromatch

Micromatch is a powerful, high-performance library for matching strings with glob patterns. It is more feature-rich than is-glob, providing advanced pattern matching, filtering, and conversion capabilities.

minimatch

Minimatch is a minimal matching utility that implements the same glob pattern matching rules as used by npm. It is similar to is-glob but also includes the ability to match patterns against strings, not just check if a string is a glob.

globby

Globby is a user-friendly glob matching utility built on top of micromatch. It extends the basic functionality of is-glob by providing methods to find files and directories in the file system using glob patterns.

node-glob

Node-glob is a full-featured glob library that can match strings against patterns and also find files in the filesystem that match a given glob. It is more comprehensive than is-glob, which only checks if a string is a glob pattern.

README

is-glob

Returns true if the given string looks like a glob pattern or an extglob pattern. This makes it easy to create code that only uses external modules like node-glob when necessary, resulting in much faster code execution and initialization time, and a better user experience.

Please consider following this project's author, Jon Schlinkert, and consider starring the project to show your :heart: and support.

Install

Install with npm:

$ npm install --save is-glob

You might also be interested in is-valid-glob and has-glob.

Usage

var isGlob = require('is-glob');

Default behavior

True

Patterns that have glob characters or regex patterns will return true:

isGlob('!foo.js');
isGlob('*.js');
isGlob('**/abc.js');
isGlob('abc/*.js');
isGlob('abc/(aaa|bbb).js');
isGlob('abc/[a-z].js');
isGlob('abc/{a,b}.js');
//=> true

Extglobs

isGlob('abc/@(a).js');
isGlob('abc/!(a).js');
isGlob('abc/+(a).js');
isGlob('abc/*(a).js');
isGlob('abc/?(a).js');
//=> true

False

Escaped globs or extglobs return false:

isGlob('abc/\\@(a).js');
isGlob('abc/\\!(a).js');
isGlob('abc/\\+(a).js');
isGlob('abc/\\*(a).js');
isGlob('abc/\\?(a).js');
isGlob('\\!foo.js');
isGlob('\\*.js');
isGlob('\\*\\*/abc.js');
isGlob('abc/\\*.js');
isGlob('abc/\\(aaa|bbb).js');
isGlob('abc/\\[a-z].js');
isGlob('abc/\\{a,b}.js');
//=> false

Patterns that do not have glob patterns return false:

isGlob('abc.js');
isGlob('abc/def/ghi.js');
isGlob('foo.js');
isGlob('abc/@.js');
isGlob('abc/+.js');
isGlob('abc/?.js');
isGlob();
isGlob(null);
//=> false

Arrays are also false (If you want to check if an array has a glob pattern, use has-glob):

isGlob(['**/*.js']);
isGlob(['foo.js']);
//=> false

Option strict

When options.strict === false the behavior is less strict in determining if a pattern is a glob. Meaning that some patterns that would return false may return true. This is done so that matching libraries like micromatch have a chance at determining if the pattern is a glob or not.

True

Patterns that have glob characters or regex patterns will return true:

isGlob('!foo.js', {strict: false});
isGlob('*.js', {strict: false});
isGlob('**/abc.js', {strict: false});
isGlob('abc/*.js', {strict: false});
isGlob('abc/(aaa|bbb).js', {strict: false});
isGlob('abc/[a-z].js', {strict: false});
isGlob('abc/{a,b}.js', {strict: false});
//=> true

Extglobs

isGlob('abc/@(a).js', {strict: false});
isGlob('abc/!(a).js', {strict: false});
isGlob('abc/+(a).js', {strict: false});
isGlob('abc/*(a).js', {strict: false});
isGlob('abc/?(a).js', {strict: false});
//=> true

False

Escaped globs or extglobs return false:

isGlob('\\!foo.js', {strict: false});
isGlob('\\*.js', {strict: false});
isGlob('\\*\\*/abc.js', {strict: false});
isGlob('abc/\\*.js', {strict: false});
isGlob('abc/\\(aaa|bbb).js', {strict: false});
isGlob('abc/\\[a-z].js', {strict: false});
isGlob('abc/\\{a,b}.js', {strict: false});
//=> false

About

Contributing

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

Running Tests

Running and reviewing unit tests is a great way to get familiarized with a library and its API. You can install dependencies and run tests with the following command:

$ npm install && npm test

Building docs

(This project's readme.md is generated by verb, please don't edit the readme directly. Any changes to the readme must be made in the .verb.md readme template.)

To generate the readme, run the following command:

$ npm install -g verbose/verb#dev verb-generate-readme && verb

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Contributors

Commits	Contributor
47	jonschlinkert
5	doowb
1	phated
1	danhper
1	paulmillr

Author

Jon Schlinkert

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• LinkedIn Profile

License

Copyright © 2019, Jon Schlinkert. Released under the MIT License.

This file was generated by verb-generate-readme, v0.8.0, on March 27, 2019.