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 |
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