WeakSet.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 September 2015.

WeakSet 实例的 delete() 方法从该 WeakSet 对象中删除指定的元素。

尝试一下

const weakset1 = new WeakSet();
const object1 = {};

weakset1.add(object1);

console.log(weakset1.has(object1));
// Expected output: true

weakset1.delete(object1);

console.log(weakset1.has(object1));
// Expected output: false

语法

js
weakSetInstance.delete(value)

参数

value

要从 WeakSet 对象中删除的值。

返回值

如果成功在 WeakSet 对象中删除了元素,则返回 true。如果未在 WeakSet 中找到该 value,则返回 false。如果 value 不是对象或非全局注册的符号,则始终返回 false

示例

使用 delete() 方法

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

ws.add(window);

ws.delete(obj); // 返回 false。没有找到要删除的对象。
ws.delete(window); // 返回 true。成功删除。

ws.has(window); // 返回 false。WeakMap 中已经不存在 window 对象。

规范

Specification
ECMAScript® 2025 Language Specification
# sec-weakset.prototype.delete

浏览器兼容性

Report problems with this compatibility data on GitHub
desktopmobileserver
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
Deno
Node.js
delete

Legend

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Full support
Full support

参见