JavaScript String includes() Method
Example
Check if a string includes with "world":
var str = "Hello world, welcome to the universe.";
var n = str.includes("world");
The result of n will be:
true
Try it yourself »
More "Try it Yourself" examples below.
Definition and Usage
The includes() method determines whether a string contains the
characters of a specified string.
This method returns true if the string contains the characters, and false if not.
Note: The includes() method is case sensitive.
Browser Support
| Method | ||||||
|---|---|---|---|---|---|---|
| includes() | 41 | 12.0 | No | 40 | 9 | 28 |
Note: The includes() method is not supported in Internet
Explorer 11 and earlier versions.
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:
var str = "Hello world, welcome to the universe.";
var n = str.includes("world", 12);
The result of n will be:
false
Try it yourself »
JavaScript String Reference
