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
Keine (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® 2025 Language Specification # sec-map.prototype.clear |
Browser-Kompatibilität
Report problems with this compatibility data on GitHubdesktop | mobile | server | ||||||||||||
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clear |
Legend
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- Full support
- Full support
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.