weakMap.set
set()方法根据指定的key和value在WeakMap对象中添加新/更新元素。
语法
wm.set(key, value);参数
key必须的。是要在WeakMap对象中添加/更新元素的key部分。value必须的。是要在WeakMap对象中添加/更新元素的value部分。
返回值
该WeakMap对象
示例
使用set方法
var wm = new WeakMap();
var obj = {};
// Add new elements to the WeakMap
wm.set(obj, 'foo').set(window, 'bar'); // chainable
// Update an element in the WeakMap
wm.set(obj, 'baz');规范
Specification | Status | Comment |
|---|---|---|
ECMAScript 2015 (6th Edition, ECMA-262)The definition of 'WeakMap.prototype.set' in that specification. | Standard | Initial definition. |
ECMAScript Latest Draft (ECMA-262)The definition of 'WeakMap.prototype.set' 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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