Map.prototype.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。

返回值

Boolean
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"); // 返回 true。成功地移除元素
myMap.has("bar");    // 返回 false。"bar" 元素将不再存在于 Map 实例中

规范

Specification Status Comment
ECMAScript 2015 (6th Edition, ECMA-262)
Map.prototype.delete
Standard Initial definition.
ECMAScript Latest Draft (ECMA-262)
Map.prototype.delete
Draft  

浏览器兼容性

Update compatibility data on GitHub
Desktop Mobile Server
Chrome Edge Firefox Internet Explorer Opera Safari Android webview Chrome for Android Firefox for Android Opera for Android Safari on iOS Samsung Internet Node.js
delete Chrome Full support 38 Edge Full support 12 Firefox Full support 13 IE Full support 11 Opera Full support 25 Safari Full support 8 WebView Android Full support 38 Chrome Android Full support 38 Firefox Android Full support 14 Opera Android Full support 25 Safari iOS Full support 8 Samsung Internet Android Full support 3.0 nodejs Full support 0.12
Full support 0.12
Full support 0.10
Disabled
Disabled From version 0.10: this feature is behind the --harmony runtime flag.

Legend

Full support  
Full support
User must explicitly enable this feature.
User must explicitly enable this feature.

相关链接