xre

xre

XRegExp regular expressions without the pain in the ass.

$ yarn add xre

Examples

Multi-line RegExp with comments

import xre from 'xre';

const date = xre`/
    (?<year>  \d{4}) - # Year
    (?<month> \d{2}) - # Month
    (?<day>   \d{2})   # Day
/x`;

const { year, month, day } = date.exec('2017-06-11');

console.log(`Year: ${year}, month: ${month}, day: ${day}`);
// → Year: 2017, month: 06, day: 11

Unicode support

import xre, { configure } from 'xre';
import XRegExp from 'xregexp';

// By default xre uses minimal version of XRegExp,
// so to use the power add-ons we have to configure it
// with full version of XRegExp:
configure({ XRegExp });

const fullName = xre`/(?<firstName>\p{Letter}+)\s(?<lastName>\p{Letter}+)/i`;

console.log(fullName.exec('Shit Ass').firstName);
// → Shit

console.log(fullName.exec('Говно Жопа').firstName);
// → Говно

console.log(fullName.exec('くそ けつ').firstName);
// → くそ

API

All built-in RegExp's methods and properties is fully supported, so you can use xre regular expressions as an argument for String's methods such as replace or match.

Methods with non-standard behavior

exec

Arguments:

• string: string — string to search.
• position: number = lastIndex — zero-based index at which to start the search.
• sticky: boolean | string = false — whether the match must start at the specified position only. The string 'sticky' is accepted as an alternative to true.

Returns:

• Match array with named backreference properties, or null.

See also:

• XRegExp docs for exec() method.

test

Arguments:

• See Xre#exec method arguments.

See also:

• XRegExp docs for test() method.

Non-standard methods

Non-standard methods are derived from XRegExp's ones, but does not take regexp argument.

• addToken (see XRegExp docs for addToken() method).
• forEach (see XRegExp docs for forEach() method).
• globalize (see XRegExp docs for globalize() method).
• match (see XRegExp docs for match() method).
• replace (see XRegExp docs for replace() method).
• split (see XRegExp docs for split() method).

Additional API

configure

Arguments:

• options:
  • XRegExp — XRegExp constructor.

Contributing

$ yarn run lint
$ yarn run test