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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 str.
length Optional
If provided, it is used as the length of str. Defaults to str.length.

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.

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;
	};
}

Examples

Using endsWith()

let 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

Specifications

Browser compatibilityUpdate compatibility data on GitHub

Desktop
Chrome Edge Firefox Internet Explorer Opera Safari
endsWith 41 12 17 No 28 9
Mobile
Android webview Chrome for Android Firefox for Android Opera for Android Safari on iOS Samsung Internet
endsWith ≤37 36 17 24 9 3.0
Server
Node.js
endsWith 4.0.0
4.0.0
0.12
Disabled
Disabled From version 0.12: this feature is behind the --harmony runtime flag.

See also

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