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WeakMap.prototype.delete()

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since июль 2015 г..

Метод delete() удаляет элемент из объекта WeakMap.

In this article

Синтаксис

wm.delete(key);

Параметры

key

Обязателен. Ключ элемента, который будет уделён из объекта WeakMap.

Возвращаемое значение

Возвращает true если элемент из объекта WeakMap удалён успешно.

Примеры

Использование метода delete

js
var wm = new WeakMap(); wm.set(window, "foo"); wm.delete(window); // Возвращает true. Успешно удалён. wm.has(window); // Возвращает false. Объекта window больше нет в WeakMap.

Спецификации

Specification
ECMAScript® 2027 Language Specification
# sec-weakmap.prototype.delete

Совместимость с браузерами

Enable JavaScript to view this browser compatibility table.

Firefox-specific notes

  • Prior to SpiderMonkey 38, this method threw a TypeError when the key parameter was not an object. This has been fixed in version 38 and later to return false as per latest ES6 standard (Firefox bug 1127827).

Смотрите также

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This page was last modified on 12 мая 2024 г. by MDN contributors.

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  1. Стандартные встроенные объекты
  2. WeakMap
  3. Конструктор
    1. WeakMap()
  4. Методы экземпляра
    1. WeakMap.prototype.delete()
    2. WeakMap.prototype.get()
    3. getOrInsert()
    4. getOrInsertComputed()
    5. WeakMap.prototype.has()
    6. WeakMap.prototype.set()
  5. Наследование
  6. Object/Function
  7. Статические методы
    1. Function.prototype.apply()
    2. Function.prototype.bind()
    3. Function.prototype.call()
    4. Function.prototype.toString()
    5. [Symbol.hasInstance]()
  8. Статические свойства
    1. Function.displayName
    2. Function.length
    3. Function.name
    4. prototype
    5. Function.arguments
    6. Function.caller
  9. Методы экземпляра
    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()
  10. Свойства экземпляра
    1. Object.prototype.__proto__
    2. Object.prototype.constructor

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