JavaScript String startsWith()

Start at position 0 (true):

let text = "Hello world, welcome to the universe.";
text.startsWith("Hello");

Start at position 1 (false):

let text = "Hello world, welcome to the universe.";
text.startsWith("Hello", 1);

Description

The startsWith() method returns true if a string starts with a specified string.

Otherwise it returns false.

The startsWith() method is case sensitive.

string.startsWith(searchValue, start)

Parameter	Description
searchValue	Required. The string to search for.
start	Optional. Start position. Default is 0.

Type	Description
A boolean	Returns `true` if the string starts with the value. Otherwise it returns `false`.

startsWith() is an ECMAScript6 (ES6) feature.

ES6 (JavaScript 2015) is supported in all modern browsers since June 2017:


Chrome 51	Edge 15	Firefox 54	Safari 10	Opera 38
May 2016	Apr 2017	Jun 2017	Sep 2016	Jun 2016

startsWith() is not supported in Internet Explorer.