Package Exports

regexr

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Readme

regexr

For composing regular expressions.

Regexr provides an ES6 template tag function that makes it easy to compose regexes out of template strings without double-escaped hell.

For example, in ES5 and below, you would have to do something like the following to compose a regular expression.

var spaceRegex = '\\s*'
var finalRegex = '\\('+spaceRegex+'\\/\\[\\\\\\d+\\]\\)*$'
finalRegex = new RegExp(finalRegex, 'g')
console.log( !!'( /[\\12358])'.match(finalRegex) ) // true

Imagine making more complex regexes. Good luck with that!

Well, with regexr, now you can do what you always wanted to do:

Usage

var r = require('regexr')
var spaceRegex = r`\s*`
var finalRegex = r`/\(${spaceRegex}\/\[\\\d+\]\)*$/g`
console.log( !!'( /[\\12358])'.match(finalRegex) ) // true

You can also use pre-seleted, hand-picked regexes to compose with:

var r = require('regexr')
var functionCallRgx = r`${r.identifier}\s*\(\s*${r.identifier}\s*\)`
console.log(!!"foo ( bar )".match(functionCallRgx)) // true

Hand-picked Regexes

r.identifier

Matches a valid JavaScript identifier. See this for details.