delete()
方法用于移除 Map
对象中指定的元素。
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myMap.delete(key);
Map
对象中移除的元素的键。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
。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
Specification | Status | Comment |
---|---|---|
ECMAScript 2015 (6th Edition, ECMA-262) Map.prototype.delete |
Standard | Initial definition. |
ECMAScript Latest Draft (ECMA-262) Map.prototype.delete |
Draft |
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Desktop | Mobile | Server | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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 | Edge Mobile Full support 12 | Firefox Android Full support 14 | Opera Android Full support 25 | Safari iOS Full support 8 | Samsung Internet Android Full support Yes | nodejs
Full support
0.12
|