KeyboardLayoutMap: forEach() 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 forEach() method of the
KeyboardLayoutMap interface executes a provided function once for
each element of the map.
The method is otherwise the same as Map.prototype.forEach().
Syntax
forEach(callbackFn)
forEach(callbackFn, thisArg)
Parameters
callbackFn-
The function to execute for each element, taking three arguments:
currentValue-
The value of the current element being processed.
indexOptional-
The index of the current element being processed.
arrayOptional-
The KeyboardLayoutMap that
forEach()is being called on.
thisArgOptional-
Value to use as
this(i.e., the referenceObject) when executingcallback.
Return value
None (undefined).
Examples
The following example iterates every location- or layout-specific string and its associated keyboard code on an English QWERTY keyboard.
navigator.keyboard.getLayoutMap().then((keyboardLayoutMap) => {
keyboardLayoutMap.forEach((key, code) => {
console.log(`${code} keyboard code represents ${key} key`);
});
});
Specifications
| Specification |
|---|
| ECMAScript® 2026 Language Specification # sec-map.prototype.foreach |