KeyboardLayoutMap: size property

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 size read-only property of the KeyboardLayoutMap interface returns the number of elements in the map.

The property is otherwise the same as Map.prototype.size.

Value

A number.

Examples

The following example get the count of the location- or layout-specific string and its associated keyboard code on an English QWERTY keyboard.

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

Specifications

Specification
ECMAScript® 2025 Language Specification
# sec-get-map.prototype.size

Browser compatibility

Report problems with this compatibility data on GitHub
desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
size
Experimental

Legend

Tip: you can click/tap on a cell for more information.

Full support
Full support
No support
No support
Experimental. Expect behavior to change in the future.

See also