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JavaScript startsWith() Method | Tutorial

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JavaScript Reference

Overview - JavaScript and HTML DOM Reference

JavaScript Objects

Browser Objects

DOM Objects

JavaScript startsWith() Method

JavaScript String Object Reference

Example

Check if a string starts with "Hello":

var str = "Hello world, welcome to the Tutorial.";
var n = str.startsWith("Hello");

n output:

true

Try it yourself »

Definition and Usage

The startsWith() method is used to check whether a string begins with a specified substring.

It returns true if the string starts with the specified substring, otherwise false.

The startsWith() method is case-sensitive.

Browser Support

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

Method	Chrome	Edge	Firefox	Safari	Opera
`startsWith()`	41	12.0	17	9	28

Syntax

string.startsWith(searchvalue, start)

Parameter Values

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

Return Value

Type	Description
Boolean	Returns `true` if the string starts with the specified substring, otherwise `false`.

Technical Details

JavaScript Version:	ECMAScript 6

More Examples

Check if a string starts with "world" from index position 6:

var str = "Hello world, welcome to the Tutorial.";
var n = str.startsWith("world", 6);