From 33058f2b292b3a581333bdfb21b8f671898c5060 Mon Sep 17 00:00:00 2001 From: Peter Bengtsson Date: Tue, 8 Dec 2020 14:40:17 -0500 Subject: initial commit --- .../reference/global_objects/map/delete/index.html | 83 ++++++++++++++++++++++ 1 file changed, 83 insertions(+) create mode 100644 files/zh-cn/web/javascript/reference/global_objects/map/delete/index.html (limited to 'files/zh-cn/web/javascript/reference/global_objects/map/delete') diff --git a/files/zh-cn/web/javascript/reference/global_objects/map/delete/index.html b/files/zh-cn/web/javascript/reference/global_objects/map/delete/index.html new file mode 100644 index 0000000000..4b8fb98c3f --- /dev/null +++ b/files/zh-cn/web/javascript/reference/global_objects/map/delete/index.html @@ -0,0 +1,83 @@ +--- +title: Map.prototype.delete() +slug: Web/JavaScript/Reference/Global_Objects/Map/delete +tags: + - ECMAScript 2015 + - JavaScript + - Map + - Method + - Prototype +translation_of: Web/JavaScript/Reference/Global_Objects/Map/delete +--- +
{{JSRef}}
+ +

 delete() 方法用于移除 Map 对象中指定的元素。

+ +
{{EmbedInteractiveExample("pages/js/map-prototype-delete.html")}}
+ + + +

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

+ + + + + + + + + + + + + + + + + + + +
SpecificationStatusComment
{{SpecName('ES6', '#sec-map.prototype.delete', 'Map.prototype.delete')}}{{Spec2('ES6')}}Initial definition.
{{SpecName('ESDraft', '#sec-map.prototype.delete', 'Map.prototype.delete')}}{{Spec2('ESDraft')}} 
+ +

浏览器兼容性

+ + + +

{{Compat("javascript.builtins.Map.delete")}}

+ +

相关链接

+ + -- cgit v1.2.3-54-g00ecf