to-regex 
Generate a regex from a string or array of strings.
Please consider following this project's author, Jon Schlinkert, and consider starring the project to show your :heart: and support.
options.contains options.negate options.nocase options.flags options.cache options.safe Related projects Author License
(TOC generated by verb using markdown-toc)
Install
Install with npm:$ npm install --save to-regexUsage
var toRegex = require('to-regex');
console.log(toRegex('foo'));
//=> /^(?:foo)$/
console.log(toRegex('foo', {negate: true}));
//=> /^(?:(?:(?!^(?:foo)$).)*)$/
console.log(toRegex('foo', {contains: true}));
//=> /(?:foo)/
console.log(toRegex(['foo', 'bar'], {negate: true}));
//=> /^(?:(?:(?!^(?:(?:foo)|(?:bar))$).)*)$/
console.log(toRegex(['foo', 'bar'], {negate: true, contains: true}));
//=> /^(?:(?:(?!(?:(?:foo)|(?:bar))).)*)$/Options
options.contains
Type:BooleanDefault:
undefinedGenerate a regex that will match any string that contains the given pattern. By default, regex is strict will only return true for exact matches.
var toRegex = require('to-regex');
console.log(toRegex('foo', {contains: true}));
//=> /(?:foo)/options.negate
Type:BooleanDefault:
undefinedCreate a regex that will match everything except the given pattern.
var toRegex = require('to-regex');
console.log(toRegex('foo', {negate: true}));
//=> /^(?:(?:(?!^(?:foo)$).)*)$/options.nocase
Type:BooleanDefault:
undefinedAdds the
i flag, to enable case-insensitive matching.var toRegex = require('to-regex');
console.log(toRegex('foo', {nocase: true}));
//=> /^(?:foo)$/iAlternatively you can pass the flags you want directly on options.flags.
options.flags
Type:StringDefault:
undefinedDefine the flags you want to use on the generated regex.
var toRegex = require('to-regex');
console.log(toRegex('foo', {flags: 'gm'}));
//=> /^(?:foo)$/gm
console.log(toRegex('foo', {flags: 'gmi', nocase: true})); //<= handles redundancy
//=> /^(?:foo)$/gmioptions.cache
Type:BooleanDefault:
trueGenerated regex is cached based on the provided string and options. As a result, runtime compilation only happens once per pattern (as long as options are also the same), which can result in dramatic speed improvements.
This also helps with debugging, since adding options and pattern are added to the generated regex.
Disable caching
toRegex('foo', {cache: false});options.safe
Type:BooleanDefault:
undefinedCheck the generated regular expression with safe-regex and throw an error if the regex is potentially unsafe.
Examples
console.log(toRegex('(x+x+)+y'));
//=> /^(?:(x+x+)+y)$/
// The following would throw an error
toRegex('(x+x+)+y', {safe: true});About
ContributingPull 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 testBuilding 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 && verbRelated projects
You might also be interested in these projects:- has-glob: Returns
trueif an array has a glob pattern. | homepage - is-glob: Returns
trueif the given string looks like a glob pattern or an extglob pattern… more | homepage - path-regex: Regular expression for matching the parts of a file path. | homepage
- to-regex-range: Pass two numbers, get a regex-compatible source string for matching ranges. Validated against more than… more | homepage
Author
Jon SchlinkertLicense
Copyright © 2018, Jon Schlinkert. Released under the MIT License.This file was generated by verb-generate-readme, v0.6.0, on February 24, 2018.
