W3cubDocs

/JavaScript

string.endsWith

The endsWith() method determines whether a string ends with the characters of a specified string, returning true or false as appropriate.

Syntax

str.endsWith(searchString[, length])

Parameters

searchString
The characters to be searched for at the end of this string.
length
Optional. If provided overwrites the considered length of the string to search in. If omitted, the default value is the length of the string.

Return value

true if the given characters are found at the end of the string; otherwise, false.

Description

This method lets you determine whether or not a string ends with another string. This method is case-sensitive.

Examples

Using endsWith()

var str = 'To be, or not to be, that is the question.';

console.log(str.endsWith('question.')); // true
console.log(str.endsWith('to be'));     // false
console.log(str.endsWith('to be', 19)); // true

Polyfill

This method has been added to the ECMAScript 6 specification and may not be available in all JavaScript implementations yet. However, you can polyfill String.prototype.endsWith() with the following snippet:

if (!String.prototype.endsWith) {
	String.prototype.endsWith = function(search, this_len) {
		if (this_len === undefined || this_len > this.length) {
			this_len = this.length;
		}
        return this.substring(this_len - search.length, this_len) === search;
	};
}

Specifications

Browser compatibility

Feature Chrome Edge Firefox Internet Explorer Opera Safari
Basic support 41 Yes 17 No 28 9
Feature Android webview Chrome for Android Edge mobile Firefox for Android IE mobile Opera Android iOS Safari
Basic support Yes 36 Yes 17 No Yes 9

See also

© 2005–2018 Mozilla Developer Network and individual contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/endsWith