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.
El método clear()
de las instancias Map
remueve todos los elementos de este map.
Pruébalo
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
Sintaxis
js
clear()
Parámetros
Ningúno.
Valor devuelto
Ningúno (undefined
).
Ejemplos
Usando 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
Especificaciones
Specification |
---|
ECMAScript® 2025 Language Specification # sec-map.prototype.clear |