From 310fd066e91f454b990372ffa30e803cc8120975 Mon Sep 17 00:00:00 2001 From: Florian Merz Date: Thu, 11 Feb 2021 12:56:40 +0100 Subject: unslug zh-cn: move --- .../proxy/handler/deleteproperty/index.html | 149 --------------------- 1 file changed, 149 deletions(-) delete mode 100644 files/zh-cn/web/javascript/reference/global_objects/proxy/handler/deleteproperty/index.html (limited to 'files/zh-cn/web/javascript/reference/global_objects/proxy/handler/deleteproperty') diff --git a/files/zh-cn/web/javascript/reference/global_objects/proxy/handler/deleteproperty/index.html b/files/zh-cn/web/javascript/reference/global_objects/proxy/handler/deleteproperty/index.html deleted file mode 100644 index 6cb4255755..0000000000 --- a/files/zh-cn/web/javascript/reference/global_objects/proxy/handler/deleteproperty/index.html +++ /dev/null @@ -1,149 +0,0 @@ ---- -title: handler.deleteProperty() -slug: Web/JavaScript/Reference/Global_Objects/Proxy/handler/deleteProperty -translation_of: Web/JavaScript/Reference/Global_Objects/Proxy/Proxy/deleteProperty ---- -
{{JSRef}}
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handler.deleteProperty() 方法用于拦截对对象属性的 {{jsxref("Operators/delete", "delete")}} 操作。

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语法

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var p = new Proxy(target, {
-  deleteProperty: function(target, property) {
-  }
-});
-
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参数

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deleteProperty 方法将会接受以下参数。 this 被绑定在 handler上。

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-
target
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目标对象。
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property
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待删除的属性名。
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返回值

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deleteProperty 必须返回一个 {{jsxref("Boolean")}} 类型的值,表示了该属性是否被成功删除。

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描述

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handler.deleteProperty() 方法可以拦截 {{jsxref("Operators/delete", "delete")}} 操作。

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拦截

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该方法会拦截以下操作:

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不变量

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如果违背了以下不变量,proxy 将会抛出一个 {{jsxref("TypeError")}}:

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示例

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以下代码演示了对 {{jsxref("Operators/delete", "delete")}} 操作的拦截。

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var p = new Proxy({}, {
-  deleteProperty: function(target, prop) {
-    console.log('called: ' + prop);
-    return true;
-  }
-});
-
-delete p.a; // "called: a"
-
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规范

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SpecificationStatusComment
{{SpecName('ES2015', '#sec-proxy-object-internal-methods-and-internal-slots-delete-p', '[[Delete]]')}}{{Spec2('ES2015')}}Initial definition.
{{SpecName('ESDraft', '#sec-proxy-object-internal-methods-and-internal-slots-delete-p', '[[Delete]]')}}{{Spec2('ESDraft')}} 
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浏览器兼容性

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{{CompatibilityTable}}
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FeatureChromeFirefox (Gecko)Internet ExplorerOperaSafari
Basic support{{CompatUnknown}}{{CompatGeckoDesktop("18")}}{{CompatUnknown}}{{CompatUnknown}}{{CompatUnknown}}
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FeatureAndroidChrome for AndroidFirefox Mobile (Gecko)IE MobileOpera MobileSafari Mobile
Basic support{{CompatUnknown}}{{CompatUnknown}}{{CompatGeckoMobile("18")}}{{CompatUnknown}}{{CompatUnknown}}{{CompatUnknown}}
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另见

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