JavaScript RegExp g Modifier

A global search for "is":

let pattern = /is/g;
let result = text.match(pattern);

Description

The "g" modifier specifies a global match.

A global match finds all matches (not only the first).

/regexp/g is an ECMAScript1 (ES1) feature.

ES1 (JavaScript 1997) is fully supported in all browsers:


Chrome	Edge	Firefox	Safari	Opera	IE
Yes	Yes	Yes	Yes	Yes	Yes

new RegExp("regexp", "g")

or simply:

/regexp/g

Using the RegExp function exec():

let text = "Is this all there is?";

let pattern = /is/g;
let result = pattern.exec(text);

Using the RegExp function test():

let pattern = /is/g;
let result = pattern.test(text);

Using the String function match():

let pattern = /is/g;
let result = text.match(pattern);

For a global, case-insensitive search, use the "i" modifier together with the g modifier.

Using the RegExp function exec():

let text = "Is this all there is?";
let result = /is/gi.exec(text);

Using the RegExp function test():

let text = "Is this all there is?";
let result = /is/gi.test(text);

Using the String function match():

let text = "Is this all there is?";
let result = text.match(/is/gi);

You can use the global property to check if the g modifier is set.

let pattern = /W3S/g;
let result = pattern.global;

In JavaScript, a regular expression text search, can be done with different methods.

With a pattern as a regular expression, these are the most common methods: