Summary

The WeakSet.prototype property represents the prototype for the WeakSet constructor.

Description

WeakSet instances inherit from WeakSet.prototype. You can use the constructor's prototype object to add properties or methods to all WeakSet instances.

Properties

WeakSet.prototype.constructor

返回构造函数即 WeakSet 本身.

Methods

WeakSet.prototype.add(value)

 在该 WeakSet 对象中添加一个新元素 value.

WeakSet.prototype.clear()

清空该 WeakSet 对象中的所有元素.

WeakSet.prototype.delete(value)

从该 WeakSet 对象中删除 value 这个元素, 之后 WeakSet.prototype.has(value) 方法便会返回 false.

WeakSet.prototype.has(value)

返回一个布尔值,  表示给定的值 value 是否存在于这个 WeakSet 中.

Specifications

Browser compatibility

Chrome-specific notes

• This feature is available behind a preference. In chrome://flags, activate the entry “Enable Experimental JavaScript”.

See also

• Set.prototype
• WeakMap.prototype