From 33058f2b292b3a581333bdfb21b8f671898c5060 Mon Sep 17 00:00:00 2001 From: Peter Bengtsson Date: Tue, 8 Dec 2020 14:40:17 -0500 Subject: initial commit --- .../global_objects/weakset/clear/index.html | 94 ++++++++++++++++++++++ 1 file changed, 94 insertions(+) create mode 100644 files/zh-cn/web/javascript/reference/global_objects/weakset/clear/index.html (limited to 'files/zh-cn/web/javascript/reference/global_objects/weakset/clear/index.html') diff --git a/files/zh-cn/web/javascript/reference/global_objects/weakset/clear/index.html b/files/zh-cn/web/javascript/reference/global_objects/weakset/clear/index.html new file mode 100644 index 0000000000..7d1e17ee9d --- /dev/null +++ b/files/zh-cn/web/javascript/reference/global_objects/weakset/clear/index.html @@ -0,0 +1,94 @@ +--- +title: WeakSet.prototype.clear() +slug: Web/JavaScript/Reference/Global_Objects/WeakSet/clear +tags: + - JavaScript + - Method + - WeakSet + - 废弃 +translation_of: Web/JavaScript/Reference/Global_Objects/WeakSet/clear +--- +
{{JSRef}} {{obsolete_header}}
+ +

clear() 方法用于删除 WeakSet 对象的所有元素,但是已经不是 ECMAScript 的一部分了。

+ +

语法

+ +
ws.clear();
+ +

示例

+ +

使用 clear方法

+ +
var ws = new WeakSet();
+
+ws.add(window);
+ws.has(window);  // true
+
+ws.clear();
+
+ws.has(window); // false
+
+ +

规范

+ +

没有规范或草案。该方法原本计划包括在 ECMAScript 6,但是在草案 revision 28 (October 14, 2014) 被抛弃了。浏览器原先的实现不久后也被移除了,它从来不是标准的一分子。

+ +

浏览器支持

+ +

{{CompatibilityTable}}

+ +
+ + + + + + + + + + + + + + + + + + + +
FeatureChromeFirefox (Gecko)Internet ExplorerOperaSafari
Basic support36{{CompatNo}} [1]{{CompatNo}}23{{CompatNo}}
+
+ +
+ + + + + + + + + + + + + + + + + + + +
FeatureAndroidFirefox Mobile (Gecko)IE MobileOpera MobileSafari Mobile
Basic support{{CompatNo}}{{CompatNo}} [1]{{CompatNo}}{{CompatNo}}{{CompatNo}}
+
+ +

[1] Added to Firefox in version 34, but removed in version 46. See {{bug(1101817)}}.

+ +

相关

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