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Map.prototype.clear() - JavaScript | MDN
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Map.prototype.clear()

Baseline Widely available

This feature is well established and works across many devices and browser versions. Its been available across browsers since julio de 2015.

El mtodo clear() de las instancias Map remueve todos los elementos de este map.

In this article

Prubalo

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()

Parmetros

Ningno.

Valor devuelto

Ningno (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 2027 LanguageSpecification
# sec-map.prototype.clear

Compatibilidad con navegadores

Vase tambin

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This page was last modified on 11 feb 2025 by MDN contributors.

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  1. Objetos globales
  2. Map
  3. Constructor
    1. Map() constructor
  4. Mtodos estticos
    1. Map.groupBy()
  5. Propiedades estticas
    1. Map[Symbol.species]
  6. Mtodos de instancia
    1. Map.prototype.clear()
    2. Map.prototype.delete()
    3. Map.prototype.entries()
    4. Map.prototype.forEach()
    5. Map.prototype.get()
    6. getOrInsert()
    7. getOrInsertComputed()
    8. Map.prototype.has()
    9. Map.prototype.keys()
    10. Map.prototype.set()
    11. Map.prototype.values()
    12. Map.prototype[Symbol.iterator]()
  7. Propiedades de instancia
    1. Map.prototype.size
  8. Herencia
  9. Object/Function
  10. Mtodos estticos
    1. Function.prototype.apply()
    2. Function.prototype.bind()
    3. Function.prototype.call()
    4. Function.prototype.toString()
    5. [Symbol.hasInstance]()
  11. Propiedades estticas
    1. Function.displayName
    2. Function.length
    3. Function.name
    4. prototype
    5. Function.prototype.arguments
    6. Function.caller
  12. Mtodos de instancia
    1. Object.prototype.__defineGetter__()
    2. __defineSetter__()
    3. __lookupGetter__()
    4. __lookupSetter__()
    5. Object.prototype.hasOwnProperty()
    6. Object.prototype.isPrototypeOf()
    7. Object.prototype.propertyIsEnumerable()
    8. Object.prototype.toLocaleString()
    9. Object.prototype.toString()
    10. Object.prototype.valueOf()
  13. Propiedades de instancia
    1. Object.prototype.__proto__
    2. Object.prototype.constructor
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