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JavaScript RegExp g Modifier

Do a global search for is"

Browser Support

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

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

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

Syntax

new RegExp("regexp", "g")

or simply:

/regexp/g

More Examples

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);

Tip

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

A global, case-insensitive search for "is":

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);

Tip

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

Example

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

Regular Expression Search Methods

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:

ExampleDescription
text.match(pattern)The String method match()
text.search(pattern)The String method search()
pattern.exec(text)The RexExp method exec()
pattern.test(text)The RegExp method test()

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