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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"><body onhashchange="funcRef();"></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>
|
