Map.prototype.clear()
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
Die clear() Methode von Map-Instanzen entfernt alle Elemente aus dieser Map.
Probieren Sie es aus
const map1 = new Map(); map1.set("bar", "baz"); map1.set(1, "foo"); console.log(map1.size); // Expected output: 2 map1.clear(); console.log(map1.size); // Expected output: 0 Syntax
js
clear() Parameter
Keine.
Rückgabewert
Keiner (undefined).
Beispiele
Verwendung von clear()
js
const myMap = new Map(); myMap.set("bar", "baz"); myMap.set(1, "foo"); console.log(myMap.size); // 2 console.log(myMap.has("bar")); // true myMap.clear(); console.log(myMap.size); // 0 console.log(myMap.has("bar")); // false Spezifikationen
| Specification |
|---|
| ECMAScript® 2026 Language Specification # sec-map.prototype.clear |