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| author | Florian Merz <me@fiji-flo.de> | 2021-02-11 12:56:40 +0100 |
|---|---|---|
| committer | Florian Merz <me@fiji-flo.de> | 2021-02-11 12:56:40 +0100 |
| commit | 310fd066e91f454b990372ffa30e803cc8120975 (patch) | |
| tree | d5d900deb656a5da18e0b60d00f0db73f3a2e88e /files/zh-cn/web/javascript/reference/global_objects/proxy/handler/deleteproperty | |
| parent | 8260a606c143e6b55a467edf017a56bdcd6cba7e (diff) | |
| download | translated-content-310fd066e91f454b990372ffa30e803cc8120975.tar.gz translated-content-310fd066e91f454b990372ffa30e803cc8120975.tar.bz2 translated-content-310fd066e91f454b990372ffa30e803cc8120975.zip | |
unslug zh-cn: move
Diffstat (limited to 'files/zh-cn/web/javascript/reference/global_objects/proxy/handler/deleteproperty')
| -rw-r--r-- | files/zh-cn/web/javascript/reference/global_objects/proxy/handler/deleteproperty/index.html | 149 |
1 files changed, 0 insertions, 149 deletions
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 ---- -<div>{{JSRef}}</div> - -<p><strong><code>handler.deleteProperty()</code></strong> 方法用于拦截对对象属性的 {{jsxref("Operators/delete", "delete")}} 操作。</p> - -<h2 id="语法">语法</h2> - -<pre class="brush: js">var p = new Proxy(target, { - deleteProperty: function(target, property) { - } -}); -</pre> - -<h3 id="参数">参数</h3> - -<p><code>deleteProperty</code> 方法将会接受以下参数。 <code>this</code> 被绑定在 handler上。</p> - -<dl> - <dt><code>target</code></dt> - <dd>目标对象。</dd> - <dt><code>property</code></dt> - <dd>待删除的属性名。</dd> -</dl> - -<h3 id="返回值">返回值</h3> - -<p><code>deleteProperty</code> 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。</p> - -<h2 id="描述">描述</h2> - -<p><code><strong>handler.deleteProperty()</strong></code> 方法可以拦截 {{jsxref("Operators/delete", "delete")}} 操作。</p> - -<h3 id="拦截">拦截</h3> - -<p>该方法会拦截以下操作:</p> - -<ul> - <li>删除属性: <code>delete proxy[foo]</code> 和 <code>delete proxy.foo</code></li> - <li>{{jsxref("Reflect.deleteProperty()")}}</li> -</ul> - -<h3 id="不变量">不变量</h3> - -<p>如果违背了以下不变量,proxy 将会抛出一个 {{jsxref("TypeError")}}:</p> - -<ul> - <li>如果目标对象的属性是不可配置的,那么该属性不能被删除。</li> -</ul> - -<h2 id="示例">示例</h2> - -<p>以下代码演示了对 {{jsxref("Operators/delete", "delete")}} 操作的拦截。</p> - -<pre class="brush: js">var p = new Proxy({}, { - deleteProperty: function(target, prop) { - console.log('called: ' + prop); - return true; - } -}); - -delete p.a; // "called: a" -</pre> - -<h2 id="规范">规范</h2> - -<table class="standard-table"> - <tbody> - <tr> - <th scope="col">Specification</th> - <th scope="col">Status</th> - <th scope="col">Comment</th> - </tr> - <tr> - <td>{{SpecName('ES2015', '#sec-proxy-object-internal-methods-and-internal-slots-delete-p', '[[Delete]]')}}</td> - <td>{{Spec2('ES2015')}}</td> - <td>Initial definition.</td> - </tr> - <tr> - <td>{{SpecName('ESDraft', '#sec-proxy-object-internal-methods-and-internal-slots-delete-p', '[[Delete]]')}}</td> - <td>{{Spec2('ESDraft')}}</td> - <td> </td> - </tr> - </tbody> -</table> - -<h2 id="浏览器兼容性">浏览器兼容性</h2> - -<div>{{CompatibilityTable}}</div> - -<div id="compat-desktop"> -<table class="compat-table"> - <tbody> - <tr> - <th>Feature</th> - <th>Chrome</th> - <th>Firefox (Gecko)</th> - <th>Internet Explorer</th> - <th>Opera</th> - <th>Safari</th> - </tr> - <tr> - <td>Basic support</td> - <td>{{CompatUnknown}}</td> - <td>{{CompatGeckoDesktop("18")}}</td> - <td>{{CompatUnknown}}</td> - <td>{{CompatUnknown}}</td> - <td>{{CompatUnknown}}</td> - </tr> - </tbody> -</table> -</div> - -<div id="compat-mobile"> -<table class="compat-table"> - <tbody> - <tr> - <th>Feature</th> - <th>Android</th> - <th>Chrome for Android</th> - <th>Firefox Mobile (Gecko)</th> - <th>IE Mobile</th> - <th>Opera Mobile</th> - <th>Safari Mobile</th> - </tr> - <tr> - <td>Basic support</td> - <td>{{CompatUnknown}}</td> - <td>{{CompatUnknown}}</td> - <td>{{CompatGeckoMobile("18")}}</td> - <td>{{CompatUnknown}}</td> - <td>{{CompatUnknown}}</td> - <td>{{CompatUnknown}}</td> - </tr> - </tbody> -</table> -</div> - -<h2 id="另见">另见</h2> - -<ul> - <li>{{jsxref("Proxy")}}</li> - <li>{{jsxref("Proxy.handler", "handler")}}</li> - <li>{{jsxref("Operators/delete", "delete")}} 操作符</li> - <li>{{jsxref("Reflect.deleteProperty()")}}</li> -</ul> |
