weakSet.delete
delete()方法从WeakSet 对象中移除指定的元素。
语法
ws.delete(value);参数
value必须。从?WeakSet对象中移除的对象。
返回值
如果在WeakSet?对象中成功移除元素则返回 true。如果 key 没有在 WeakSet 中找到或者 key 不是一个对象，则返回 false。
示例
使用delete方法
var ws = new WeakSet();
var 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.规范
Specification | Status | Comment |
|---|---|---|
ECMAScript 2015 (6th Edition, ECMA-262)The definition of 'WeakSet.prototype.delete' in that specification. | Standard | Initial definition. |
ECMAScript Latest Draft (ECMA-262)The definition of 'WeakSet.prototype.delete' in that specification. | Draft | ? |
浏览器兼容性
Feature | Chrome | Edge | Firefox (Gecko) | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|---|
Basic support | 36 | (Yes) | 34 (34) | No support | 23 | No support |
Feature | Android | Edge | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|---|
Basic support | No support | (Yes) | 34.0 (34) | No support | No support | No support |
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