weakMap.delete
delete()方法可以从一个WeakMap对象中删除指定的元素。
语法
wm.delete(key);参数
key需要删除的元素的键
返回值
如果成功删除，返回true，否则返回false。
示例
使用delete方法
var wm = new WeakMap();
wm.set(window, 'foo');
wm.delete(window); // Returns true. Successfully removed.
wm.has(window); // Returns false. The window object is no longer in the WeakMap.规范
Specification | Status | Comment |
|---|---|---|
ECMAScript 2015 (6th Edition, ECMA-262)The definition of 'WeakMap.prototype.delete' in that specification. | Standard | Initial definition. |
ECMAScript Latest Draft (ECMA-262)The definition of 'WeakMap.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) | 6.0 (6.0) | 11 | 23 | 7.1 |
Feature | Android | Edge | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|---|
Basic support | No support | (Yes) | 6.0 (6.0) | No support | No support | 8 |
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