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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 :heart: and support.

Install

Install with npm:

$ npm install --save regex-not

Usage

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

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

not(string[, options]);

Example

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"):

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:

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"):

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

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

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
to-regex: Generate a regex from a string or array of strings. | homepage

Contributors

| Commits | Contributor | | --- | --- | | 9 | jonschlinkert | | 1 | doowb | | 1 | EdwardBetts |

Author

Jon Schlinkert

License

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

README.md