is-regex
Advanced tools
Package description
The is-regex npm package is a utility for checking if a value is a regular expression. It is primarily used to determine whether a given value is an instance of a RegExp object.
Check if a value is a RegExp
This feature allows you to verify if a value is a regular expression by returning a boolean result. It's useful when you need to ensure that a variable contains a valid RegExp object before performing operations that are specific to regular expressions.
const isRegex = require('is-regex');
console.log(isRegex(/abc/)); // true
console.log(isRegex('abc')); // falseSimilar to is-regex, is-regexp is a package that checks if a value is a regular expression. It provides a similar functionality but may have different implementation details or dependencies.
This is a Lodash module to check if a value is classified as a RegExp object. While it offers similar functionality, it comes from the Lodash library which is a broader utility toolkit and might be preferred in projects already using Lodash.
Changelog
v1.0.5 - 2019-12-15
af728b2jscs 1b8cfe8auto-changelog c3131d8node v8.1, v7.10, v6.11, v4.8; newer npm fails on older nodes 660b658node v9.3, v8.9, v6.12; use nvm install-latest-npm; pin included builds to LTS 7c25218node v12.10, v11.15, v10.16, v8.16, v6.17 fa955479fd2a29node v11.3, v10.14, v8.14, v6.15 7f2ac41node v10.0, v9.11, v8.11, v6.14, v4.9 6fa2b0feslint, @ljharb/eslint-config 697e1dead86dc9eslint, @ljharb/eslint-config, jscs, nsp, replace, semver, tape 5c99c8eeslint, @ljharb/eslint-config, replace, semver, tape bb63686eslint, @ljharb/eslint-config@, replace, semver, tape ddf3670tape, nsp, eslint, @ljharb/eslint-config e7b5a62eslint, @ljharb/eslint-config, covert, tape c803db5nsp to npm audit b7239beeslint, nsp, semver, tape 347ee6c3866575npx aud instead of nsp or npm audit with hoops d099a39funding field 741aecdeclint instead of editorconfig-tools bc6aa75node v10.1 262226feslint 31fd719has e9e25a3replace aeeb9682a6290ensp fc74c2bReadme
#is-regex 
Is this value a JS regex? This module works cross-realm/iframe, and despite ES6 @@toStringTag.
var isRegex = require('is-regex');
var assert = require('assert');
assert.notOk(isRegex(undefined));
assert.notOk(isRegex(null));
assert.notOk(isRegex(false));
assert.notOk(isRegex(true));
assert.notOk(isRegex(42));
assert.notOk(isRegex('foo'));
assert.notOk(isRegex(function () {}));
assert.notOk(isRegex([]));
assert.notOk(isRegex({}));
assert.ok(isRegex(/a/g));
assert.ok(isRegex(new RegExp('a', 'g')));
Simply clone the repo, npm install, and run npm test
FAQs
Is this value a JS regex? Works cross-realm/iframe, and despite ES6 @@toStringTag
The npm package is-regex receives a total of 18,167,541 weekly downloads. As such, is-regex popularity was classified as popular.
We found that is-regex demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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