3.6 KiB
regex-not 
Create a javascript regular expression for matching everything except for the given string.
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
Related 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
Contributing
Pull requests and stars are always welcome. For bugs and feature requests, please create an issue.
Building docs
(This document was generated by verb-generate-readme (a verb generator), please don't edit the readme directly. Any changes to the readme must be made in .verb.md.)
To generate the readme and API documentation with verb:
$ npm install -g verb verb-generate-readme && verb
Running tests
Install dev dependencies:
$ npm install -d && npm test
Author
Jon Schlinkert
License
Copyright © 2016, Jon Schlinkert. Released under the MIT license.
This file was generated by verb-generate-readme, v0.1.31, on October 07, 2016.