KeyboardLayoutMap: has() method

Limited availability

This feature is not Baseline because it does not work in some of the most widely-used browsers.

Experimental: This is an experimental technology
Check 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 specification.

The method is otherwise the same as Map.prototype.has().

Syntax

has(key)

Parameters

key

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

Return value

A Boolean indicating whether the specified key was found.

Examples

The following example checks whether the location- or layout-specific string associated with the keyboard code that corresponds to the 'W' key on an English QWERTY keyboard exists.

js
navigator.keyboard.getLayoutMap().then((keyboardLayoutMap) => {
  console.log(keyboardLayoutMap.has("KeyW"));
});

Specifications

Specification

ECMAScript® 2027 Language Specification
# sec-map.prototype.has

Browser compatibility

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Keyboard API
KeyboardLayoutMap
Instance properties
1. size
Instance methods
Related pages for Keyboard API
1. Keyboard
2. Navigator.keyboard