regex-not    

Create a javascript regular expression for matching everything except for the given string.

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

Install

Install with npm:

sh
$ npm install --save regex-not

Usage

js
var not = require('regex-not');

The main export is a function that takes a string an options object.

js
not(string[, options]);

Example

js
var not = require('regex-not');
console.log(not('foo'));
//=> /^(?:(?!^(?:foo)$).)+$/

Strict matching

By default, the returned regex is for strictly (not) matching the exact given pattern (in other words, "match this string if it does NOT _exactly equal_ foo"):

js
var re = not('foo');
console.log(re.test('foo'));     //=> false
console.log(re.test('bar'));     //=> true
console.log(re.test('foobar'));  //=> true
console.log(re.test('barfoo'));  //=> true

.create

Returns a string to allow you to create your own regex:

js
console.log(not.create('foo'));
//=> '(?:(?!^(?:foo)$).)+'

Options

options.contains

You can relax strict matching by setting options.contains to true (in other words, "match this string if it does NOT _contain_ foo"):

js
var re = not('foo');
console.log(re.test('foo', {contains: true}));     //=> false
console.log(re.test('bar', {contains: true}));     //=> true
console.log(re.test('foobar', {contains: true}));  //=> false
console.log(re.test('barfoo', {contains: true}));  //=> false

About

<details> <summary><strong>Contributing</strong></summary>

Pull requests and stars are always welcome. For bugs and feature requests, [please create an issue](../../issues/new).

</details>

<details> <summary><strong>Running Tests</strong></summary>

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:

sh
$ npm install && npm test

</details>

<details> <summary><strong>Building docs</strong></summary>

_(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](.verb.md) readme template.)_

To generate the readme, run the following command:

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

</details>

Related projects

You might also be interested in these projects:

• regex-cache: Memoize the results of a call to the RegExp constructor, avoiding repetitious runtime compilation of… more | [homepage](https://github.com/jonschlinkert/regex-cache "Memoize the results of a call to the RegExp constructor, avoiding repetitious runtime compilation of the same string and options, resulting in surprising performance improvements.")
• to-regex: Generate a regex from a string or array of strings. | [homepage](https://github.com/jonschlinkert/to-regex "Generate a regex from a string or array of strings.")

Contributors

Author

Jon Schlinkert

• linkedin/in/jonschlinkert
• github/jonschlinkert
• twitter/jonschlinkert

License

Copyright © 2018, Jon Schlinkert. Released under the [MIT License](LICENSE).

_This file was generated by verb-generate-readme, v0.6.0, on February 19, 2018._