map.delete
map.delete
delete()方法用于移除Map对象中指定的元素。
语法
myMap.delete(key
参数
key必须。从Map对象中移除的元素的键（key）。
返回值
如果Map对象中存在该元素，则移除它并返回true；否则如果该元素不存在则返回false。
示例
使用 delete 方法
var myMap = new Map(
myMap.set('bar', 'foo'
myMap.delete('bar' // Returns true. Successfully removed.
myMap.has('bar' // Returns false. The "bar" element is no longer present.
规范
| Specification | Status | Comment |
|---|---|---|
| ECMAScript 2015 (6th Edition, ECMA-262)The definition of 'Map.prototype.delete' in that specification. | Standard | Initial definition. |
| ECMAScript Latest Draft (ECMA-262)The definition of 'Map.prototype.delete' in that specification. | Draft | |
浏览器兼容性
| Feature | Chrome | Edge | Firefox (Gecko) | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|---|
| Basic support | 38 | (Yes) | 13.0 (13.0) | 11 | 25 | 7.1 |
| Feature | Android | Chrome for Android | Edge | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|---|---|
| Basic support | No support | 38 | (Yes) | 13.0 (13.0) | No support | No support | 8 |
