RegExp.prototype.global - JavaScript

global
source
Object/Function
Static methods
1. toString()
2. displayName Non-standard
3. arguments Non-standard Deprecated
4. caller Non-standard Deprecated
Instance methods
1. __defineGetter__() Deprecated
2. __defineSetter__() Deprecated
3. __lookupGetter__() Deprecated
4. __lookupSetter__() Deprecated
5. toLocaleString()
6. __proto__ Deprecated
7. RegExp instances returns whether or not the g flag is used with this regular expression.

Try it

const regex1 = /foo/g;

console.log(regex1.global);
/ Expected output: true

const regex2 = /bar/i;

console.log(regex2.global);
/ Expected output: false

RegExp.prototype.global has the value true if the g flag was used; otherwise, false. The g flag indicates that the regular expression should be tested against all possible matches in a string. Each call to lastIndex property, so that the next call to exec() will start at the next character.

Some methods, such as [Symbol.replace]() methods (called by String.prototype.replace()) would also have different behaviors when the regex is global.

The set accessor of global is undefined. You cannot change this property directly.

Examples

Using global

const regex = /foo/g;
console.log(regex.global); / true

const str = "fooexamplefoo";
const str1 = str.replace(regex, "");
console.log(str1); / example

const regex1 = /foo/;
const str2 = str.replace(regex1, "");
console.log(str2); / examplefoo

Specifications

Specification
ECMAScript® 2026 Language Specification # sec-get-regexp.prototype.global