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.
navigator.keyboard.getLayoutMap().then((keyboardLayoutMap) => {
console.log(keyboardLayoutMap.has("KeyW"));
});
Specifications
| Specification |
|---|
| ECMAScript® 2026 Language Specification # sec-map.prototype.has |
Browser compatibility
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