WeakSet.prototype.delete()

¥Syntax

weakSetInstance.delete(value)

¥Parameters

value

要从 WeakSet 对象中删除的值。

¥Return value

true（如果 WeakSet 对象中的元素已成功删除）。如果在 WeakSet 中找不到 value，则为 false。如果 value 不是对象或 未注册符号，则始终返回 false。

¥true if an element in the WeakSet object has been removed successfully. false if the value is not found in the WeakSet. Always returns false if value is not an object or a non-registered symbol.

¥Examples

¥Using the delete() method

const ws = new WeakSet();
const obj = {};

ws.add(window);

ws.delete(obj); // Returns false. No obj found to be deleted.
ws.delete(window); // Returns true. Successfully removed.

ws.has(window); // Returns false. The window is no longer present in the WeakSet.

¥See also

• WeakSet
• WeakSet.prototype.add()
• WeakSet.prototype.has()