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----
-title: window.onhashchange
-slug: Web/API/Window/onhashchange
-tags:
- - HTML-DOM
- - Property
- - Reference
- - WindowEventHandlers
-translation_of: Web/API/WindowEventHandlers/onhashchange
----
-<p>{{APIRef("HTML DOM")}}</p>
-
-<p>当 一个窗口的 hash (URL 中 # 后面的部分)改变时就会触发 <strong>hashchange </strong>事件(参见 {{domxref("Window.location", "location.hash")}})。</p>
-
-<h2 class="editable" id="语法"><span>语法</span></h2>
-
-<pre class="syntaxbox">window.onhashchange = funcRef;
-</pre>
-
-<p>或者</p>
-
-<pre class="syntaxbox">&lt;body onhashchange="funcRef();"&gt;</pre>
-
-<p>以上操作将覆盖现有的事件处理程序。</p>
-
-<p>为了添加一个新的事件处理程序,而不覆盖掉已有的其他事件处理程序,可以使用函数 <strong>"addEventListener"</strong>。</p>
-
-<pre class="syntaxbox">window.addEventListener("hashchange", funcRef, false);
-</pre>
-
-<h3 id="参数"><span>参数</span></h3>
-
-<dl>
- <dt><code>funcRef</code></dt>
- <dd>对一个函数的引用。</dd>
-</dl>
-
-<h2 id="例子">例子</h2>
-
-<pre class="brush: js">if ("onhashchange" in window) {
- alert("该浏览器支持 hashchange 事件!");
-}
-
-function locationHashChanged() {
- if (location.hash === "#somecoolfeature") {
- somecoolfeature();
- }
-}
-
-window.onhashchange = locationHashChanged;
-</pre>
-
-<h2 class="editable" id="hashchange_事件">hashchange 事件</h2>
-
-<p><code>hashchange</code> 事件对象有下面两个属性:</p>
-
-<table class="standard-table">
- <tbody>
- <tr>
- <td class="header">属性</td>
- <td class="header">类型</td>
- <td class="header">描述</td>
- </tr>
- <tr>
- <td><code>newURL</code> {{ gecko_minversion_inline("6.0") }}</td>
- <td><code>DOMString</code></td>
- <td>当前页面新的URL</td>
- </tr>
- <tr>
- <td><code>oldURL</code> {{ gecko_minversion_inline("6.0") }}</td>
- <td><code>DOMString</code></td>
- <td>当前页面旧的URL</td>
- </tr>
- </tbody>
-</table>
-
-<h3 id="Workaround_for_event.newURL_and_event.oldURL">Workaround for event.newURL and event.oldURL</h3>
-
-<pre class="brush: js">//let this snippet run before your hashchange event binding code
-if(!window.HashChangeEvent)(function(){
- var lastURL=document.URL;
- window.addEventListener("hashchange",function(event){
- Object.defineProperty(event,"oldURL",{enumerable:true,configurable:true,value:lastURL});
- Object.defineProperty(event,"newURL",{enumerable:true,configurable:true,value:document.URL});
- lastURL=document.URL;
- });
-}());</pre>
-
-<h2 id="规范">规范</h2>
-
-<table class="standard-table">
- <thead>
- <tr>
- <th scope="col">Specification</th>
- <th scope="col">Status</th>
- <th scope="col">Comment</th>
- </tr>
- </thead>
- <tbody>
- <tr>
- <td>{{SpecName('HTML WHATWG', '#windoweventhandlers', 'GlobalEventHandlers')}}</td>
- <td>{{Spec2('HTML WHATWG')}}</td>
- <td> </td>
- </tr>
- <tr>
- <td>{{SpecName('HTML5.1', '#windoweventhandlers', 'GlobalEventHandlers')}}</td>
- <td>{{Spec2('HTML5.1')}}</td>
- <td> </td>
- </tr>
- <tr>
- <td>{{SpecName("HTML5 W3C", "#windoweventhandlers", "GlobalEventHandlers")}}</td>
- <td>{{Spec2('HTML5 W3C')}}</td>
- <td> </td>
- </tr>
- </tbody>
-</table>
-
-<h2 id="浏览器兼容性">浏览器兼容性</h2>
-
-<p>{{Compat("api.WindowEventHandlers.onhashchange")}}</p>
-
-<ul>
- <li><a href="/en-US/docs/DOM/Manipulating_the_browser_history" title="DOM/Manipulating the browser history">Manipulating the browser history</a>, <a href="/en-US/docs/DOM/window.history" title="DOM/window.history">history.pushState() and history.replaceState()</a> methods, <a href="/en-US/docs/DOM/window.onpopstate" title="DOM/window.onpopstate">popstate</a> event.</li>
-</ul>