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+---
+title: GlobalEventHandlers.onwheel
+slug: Web/API/GlobalEventHandlers/onwheel
+tags:
+  - API
+  - DOM
+  - Event Handler
+  - GlobalEventHandlers
+  - Property
+  - Reference
+  - onwheel
+translation_of: Web/API/GlobalEventHandlers/onwheel
+---
+<p>{{ ApiRef("DOM") }}</p>
+
+<h2 id="归纳说明">归纳说明</h2>
+
+<p>{{domxref("GlobalEventHandlers")}} 的 <code>onwheel</code> 特性指向当前元素的滑轮滑动事件函数 {{domxref("EventHandler")}}。</p>
+
+<div class="blockIndicator note">
+<p><strong>注意：</strong>不要混淆 <code>onwheel</code><strong> </strong>和 {{domxref("GlobalEventHandlers.onscroll", "onscroll")}}：<code>onwheel</code> 通常用于处理滑轮的滚动事件，而 <code>onscroll</code> 用于处理某个对象内容的滚动。</p>
+</div>
+
+<h2 id="语法">语法</h2>
+
+<pre class="brush: js">target.onwheel = <em>functionRef;</em>
+</pre>
+
+<h3 id="值">值</h3>
+
+<p><code>functionRef</code> 是一个函数名或者<a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/function">函数表达式</a>。该函数接受一个 {{domxref("WheelEvent")}} 对象作为唯一的传入参数。</p>
+
+<h2 id="举例">举例</h2>
+
+<p>以下例子展示了如何使用鼠标（或其它光标设备）的滚轮来缩放一个元素。</p>
+
+<h3 id="HTML">HTML</h3>
+
+<pre class="brush: html">&lt;div&gt;Scale me with your mouse wheel.&lt;/div&gt;</pre>
+
+<h3 id="CSS">CSS</h3>
+
+<pre class="brush: css">body {
+  min-height: 100vh;
+  margin: 0;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+}
+
+div {
+  width: 80px;
+  height: 80px;
+  background: #cdf;
+  padding: 5px;
+  transition: transform .3s;
+}</pre>
+
+<h3 id="JavaScript">JavaScript</h3>
+
+<pre class="brush: js">function zoom(event) {
+  event.preventDefault();
+
+  if (event.deltaY &lt; 0) {
+    // 放大
+    scale *= event.deltaY * -2;
+  }
+  else {
+    // 缩小
+    scale /= event.deltaY * 2;
+  }
+
+  // 限制缩放
+  scale = Math.min(Math.max(.125, scale), 4);
+
+  // 应用缩放过渡效果
+  el.style.transform = `scale(${scale})`;
+}
+
+let scale = 1;
+const el = document.querySelector('div');
+document.onwheel = zoom;</pre>
+
+<h3 id="结果">结果</h3>
+
+<p>{{EmbedLiveSample("Examples", 700, 400)}}</p>
+
+<h2 id="Specification" name="Specification">详情指南</h2>
+
+<table class="spectable 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-onwheel','onwheel')}}</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>
+
+<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 (WebKit)</th>
+  </tr>
+  <tr>
+   <td>Basic support</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+  </tr>
+ </tbody>
+</table>
+</div>
+
+<div id="compat-mobile">
+<table class="compat-table">
+ <tbody>
+  <tr>
+   <th>Feature</th>
+   <th>Android</th>
+   <th>Android Webview</th>
+   <th>Chrome for Android</th>
+   <th>Firefox Mobile (Gecko)</th>
+   <th>Firefox OS</th>
+   <th>IE Mobile</th>
+   <th>Opera Mobile</th>
+   <th>Safari Mobile</th>
+  </tr>
+  <tr>
+   <td>Basic support</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+  </tr>
+ </tbody>
+</table>
+</div>
+
+<h3 id="注意">注意</h3>
+
+<p>当用户在相应元素上滚动滑轮便触发 {{ event("wheel") }} 事件。</p>
+
+<h2 id="参见">参见</h2>
+
+<ul>
+ <li><a href="https://developer.mozilla.org/en-US/docs/Web/API/Document/wheel_event">Document: <code>wheel</code> event</a></li>
+ <li><a href="https://developer.mozilla.org/en-US/docs/Web/API/Element/wheel_event">Element: <code>wheel</code> event</a></li>
+</ul>
+
+<p>
+ <audio style="display: none;"></audio>
+</p>
+
+<p>
+ <audio style="display: none;"></audio>
+</p>
+
+<p>
+ <audio style="display: none;"></audio>
+</p>