Regex

JavaScript Regular Expression Library for NodeJS and Browsers.

Features

• Named Groups (?<name>expression), (?'name'expression)

• Group index positions within the input

• Named Backreferences \k<name>, \k'name'

• Named subexpressions \g<name>

• Comment Groups (?# my comment)

• Atomic Groups (?>ab|c)

  Temporarly disabled for better performance. The group is converted into JS none-captured group.

• Positive-/Negative Lookbehind (?<=expression) (?<!expression)

• Anchors \A, \Z, \z, \G

• Possessive Quantifiers ++ *+

• Options

  • x : (?x) \\d #comment

  • i : a(?i)b(?-i)c(?i:hello)

    Temporarly disabled for better performance. The only first matched entry defines the flags for the expression

• Unicode

  • \x{HEX} : \x{200D}
  • \p{CATEGORY} : \p{L}

• POSIX

  • [:ascii:], [:^ascii:], etc

• Characters class

  • intersection: [a-z&&[^c]]

• Character types

  • (non-) hexadecimal : \h, \H

Named Groups

var rgx = new Regex('Name:\\s*(?<name>\\w+)');
var match = rgx.mach('My Name: Baz');
equals(match.groups.name, 'Baz');

API

Npm/Bower

$ npm i atma-regex -s
$ bower install atma-regex --save

var Regex = require('atma-regex');
var rgx = new Regex(pattern: string, flags: string);

Regex::

• exec(input:string, index: number = this.lastMatch): JsMatch
• match(input:string, index: number = this.lastMatch): RegexMatch
• matches(input:string): RegexMatch[]
• lastIndex: number

JsMatch::

Javascript-compatible result object with additional properties:

• groups:Object: key-value. Named group values

RegexMatch::

• value:string: full match
• index:number: match index
• groups?: RegexGroupMatch[]
• groups[key]:string : Named group value

RegexGroupMatch::

• value:string: full match
• index:number: match index

Sample:

var Regex = require('atma-regex');
var rgx = new Regex('(?<=a)([pr])');
var match = rgx.match('-p--apa');

console.log(`Matches '${match.value}' at pos #${match.index}`);

Live example

See more examples in tests

:copyright: MIT