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  1. Tecnologia Web para desenvolvedores
  2. JavaScript
  3. Referência JavaScript
  4. Objetos Globais
  5. Map
  6. Map.prototype.clear()
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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 julho de 2015.

O método clear() remove todos os elementos de um objeto Map.

In this article

Experimente

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

Sintaxe

js
clear();

Valor retornado

undefined.

Exemplos

Usando o clear()

js
var myMap = new Map(); myMap.set("bar", "baz"); myMap.set(1, "foo"); myMap.size; // 2 myMap.has("bar"); // true myMap.clear(); myMap.size; // 0 myMap.has("bar"); // false

Especificações

Specification
ECMAScript® 2027 Language Specification
# sec-map.prototype.clear

Compatibilidade com navegadores

Enable JavaScript to view this browser compatibility table.

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This page was last modified on 17 de fev. de 2025 by MDN contributors.

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  1. Objetos Globais
  2. Map
  3. Construtor
    1. Map() constructor
  4. Métodos estáticos
    1. groupBy()
  5. Propriedades estáticas
    1. get Map[@@species]
  6. Métodos de instância
    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[@@iterator]()
  7. Propriedades de instância
    1. Map.prototype.size
  8. Herança
  9. Object/Function
  10. Métodos estáticos
    1. Function.prototype.apply()
    2. Function.prototype.bind()
    3. Function.prototype.call()
    4. Function.prototype.toString()
    5. [Symbol.hasInstance]()
  11. Propriedades estáticas
    1. Function.displayName
    2. Function.length
    3. Function.name
    4. prototype
    5. Function.arguments
    6. Function.caller
  12. Métodos de instância
    1. Object.prototype.__defineGetter__()
    2. Object.prototype.__defineSetter__()
    3. Object.prototype.__lookupGetter__()
    4. Object.prototype.__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. Propriedades de instância
    1. Object.prototype.__proto__
    2. Object.prototype.constructor

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