JavaScript String includes()
Examples
Check if a string includes "world":
let text = "Hello world, welcome to the universe.";
let result = text.includes("world");
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let text = "Hello World, welcome to the universe.";
let result = text.includes("world", 12);
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More examples below.
Definition and Usage
The includes() method returns true
if a string contains a specified string.
Otherwise it returns false.
The includes() method is case sensitive.
Syntax
string.includes(searchvalue, start)
Parameters
| Parameter | Description |
| searchvalue | Required. The string to search for. |
| start | Optional. The position to start from. Default value is 0. |
Return Value
| Type | Description |
| A boolean. | true if the string contains the value,
otherwise false. |
More Examples
Start at position 12:
let text = "Hello world, welcome to the universe.";
let result = text.includes("world", 12);
Try it Yourself »
Browser Support
includes() is an ECMAScript6 (ES6) feature.
ES6 (JavaScript 2015) is supported in all modern browsers:
| Chrome | Edge | Firefox | Safari | Opera |
| Yes | Yes | Yes | Yes | Yes |
includes() is not supported in Internet Explorer 11 (or earlier).
