regexp.prototype.flags

RegExp.prototype.flags

An ES6 spec-compliant RegExp.prototype.flags shim. Invoke its "shim" method to shim RegExp.prototype.flags if it is unavailable. Note: RegExp#flags requires a true ES5 environment - specifically, one with ES5 getters.

This package implements the es-shim API interface. It works in an ES5-supported environment and complies with the spec.

Most common usage:

var flags = require('regexp.prototype.flags');
var assert = require('assert');

assert(flags(/a/) === '');
assert(flags(new RegExp('a')) === '');
assert(flags(/a/mig) === 'gim');
assert(flags(new RegExp('a', 'mig')) === 'gim');

if (!RegExp.prototype.flags) {
	flags.shim();
}

assert(flags(/a/) === /a/.flags);
assert(flags(new RegExp('a')) === new RegExp('a').flags);
assert(flags(/a/mig) === /a/mig.flags);
assert(flags(new RegExp('a', 'mig')) === new RegExp('a', 'mig').flags);

Tests

Simply clone the repo, npm install, and run npm test

Changelog

v1.5.3 - 2024-10-03

Fixed

• [Fix] avoid unnecessary polyfill #31

Commits

• [Dev Deps] update @es-shims/api, @ljharb/eslint-config, aud, object-inspect, tape 9e8bc20
• [Dev Deps] update @es-shims/api, auto-changelog, es-value-fixtures, tape c32be8e
• [readme] fix typos 195c32e
• [Deps] update call-bind, set-function-name 207517f
• [Dev Deps] update available-regexp-flags, tape b3854f7
• [Tests] replace aud with npm audit d3ee951
• [Dev Deps] update hasown 9e407c4
• [Dev Deps] add missing peer dep 0199bfd