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JavaScript String includes()

Example

Check if a string includes "world":

let str = "Hello world, welcome to the universe.";
str.includes("world")   // Returns true
Try it Yourself »

More "Try it Yourself" examples below.


Definition and Usage

The includes() method returns true if a string contains a specified string, otherwise false.

includes() is case sensitive.


Browser Support

The numbers in the table specify the first browser version that fully supports the method.

Chrome 41 Edge 12 Firefox 40 Safari 9 Opera 36
Mar 2015 Jul 2015 Aug 2015 Oct 2015 Mar 2016

includes() is not supported in Internet Explorer.


Syntax

string.includes(searchvalue, start)

Parameter Values

Parameter Description
searchvalue Required. The string to search for
start Optional. Default 0. At which position to start the search


Technical Details

Return Value: A Boolean. Returns true if the string contains the value, otherwise it returns false
JavaScript Version: ECMAScript 6

More Examples

Check if a string includes "world", starting the search at position 12:

let str = "Hello world, welcome to the universe.";
str.includes("world", 12)   // Returns false
Try it Yourself »

Related Pages

String Tutorial

String Methods

String Search