Web/API/KeyboardLayoutMap/has

This is an experimental technologyCheck the Browser compatibility table carefully before using this in production.

The has() method of the KeyboardLayoutMap interface returns a boolean indicating whether the object has an element with the specified key. A list of valid keys is found in the UI Events KeyboardEvent code Values spec.

Syntax

var aBoolean = KeyboardLayoutMap.has(key)

Parameters

key

The key of an element to search for in the map.

Return value

A Boolean indicating whether the specifed key was found.

Example

Specification	Status	Comment
Keyboard MapThe definition of 'has()' in that specification.	Editor's Draft	Initial definition.

Browser compatibility

The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
has Experimental'	Chrome Full support 69	Edge Full support 79	Firefox No support No	IE No support No	Opera Full support 56	Safari No support No	WebView Android No support No	Chrome Android No support No	Firefox Android No support No	Opera Android Full support 48	Safari iOS No support No	Samsung Internet Android No support No

Legend

Full support  

Full support

No support  

No support

Experimental. Expect behavior to change in the future.'

Experimental. Expect behavior to change in the future.

KeyboardLayoutMap.has() by Mozilla Contributors is licensed under CC-BY-SA 2.5.