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+---
+title: WindowEventHandlers.onstorage
+slug: Web/API/WindowEventHandlers/onstorage
+tags:
+  - API
+  - Web Storage
+  - WindowEventHandlers
+  - 属性
+translation_of: Web/API/WindowEventHandlers/onstorage
+---
+<div class="syntaxbox">{{ ApiRef() }}</div>
+
+<p><strong><code>WindowEventHandlers.onstorage</code></strong> 属性包含一个在{{event("storage")}}事件触发时的事件句柄。 </p>
+
+<p>注意：该事件不在导致数据变化的当前页面触发（如果浏览器同时打开一个域名下面的多个页面，当其中的一个页面改变 <code>sessionStorage</code> 或 <code>localStorage</code> 的数据时，其他所有页面的  <code>storage</code>  事件会被触发，而原始页面并不触发 <code>storage</code> 事件）</p>
+
+<h2 id="Syntax" name="Syntax">语法</h2>
+
+<pre class="syntaxbox"><em>windowObj</em>.onstorage = function() { ... };</pre>
+
+<h2 id="Specification" name="Specification">用例</h2>
+
+<pre class="brush: js">window.onstorage = function(e) {
+  console.log( e.key + ' 键已经从 ' + e.oldValue + ' 改变为 ' + e.newValue + '.');
+};</pre>
+
+<h2 id="说明书">说明书</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('HTML WHATWG','webappapis.html#handler-window-onstorage','onstorage')}}</td>
+   <td>{{Spec2('HTML WHATWG')}}</td>
+   <td></td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="浏览器兼容性">浏览器兼容性</h2>
+
+<p>{{CompatibilityTable}}</p>
+
+<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 (WebKit)</th>
+  </tr>
+  <tr>
+   <td>Basic support</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatGeckoDesktop(45)}}</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatUnknown}}</td>
+  </tr>
+ </tbody>
+</table>
+</div>
+
+<div id="compat-mobile" style="line-height: 19.0909080505371px;">
+<table class="compat-table">
+ <tbody>
+  <tr>
+   <th>Feature</th>
+   <th>Android</th>
+   <th>Android Webview</th>
+   <th>Firefox Mobile (Gecko)</th>
+   <th>Firefox OS</th>
+   <th>IE Mobile</th>
+   <th>Opera Mobile</th>
+   <th>Safari Mobile</th>
+   <th>Chrome for Android</th>
+  </tr>
+  <tr>
+   <td>Basic support</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatGeckoMobile(45)}}</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatUnknown}}</td>
+  </tr>
+ </tbody>
+</table>
+</div>