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+---
+title: DOMPoint.w
+slug: Web/API/DOMPoint/w
+translation_of: Web/API/DOMPoint/w
+---
+<div>{{APIRef("DOM")}}</div>
+
+<p><span class="seoSummary"><code><strong>DOMPoint</strong></code> 的 w 属性表示该点的空间透视值。</span></p>
+
+<h2 id="语法">语法</h2>
+
+<pre class="syntaxbox">var <em>perspective</em> = <em>DOMPoint</em>.w;</pre>
+
+<h3 id="值">值</h3>
+
+<p>双精度浮点值，表示该点的空间透视值。这个值的类型并没有严格限制，意味着它可以是 {{jsxref("NaN")}} 或 {{jsxref("Infinity", "±Infinity")}}。 默认值为 1.0。</p>
+
+<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('Geometry Interfaces', '#dom-dompoint-w', 'w')}}</td>
+   <td>{{Spec2('Geometry Interfaces')}}</td>
+   <td>Initial definition</td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="浏览器兼容性">浏览器兼容性</h2>
+
+
+
+<p>{{Compat("api.DOMPointReadOnly.w")}}</p>
+
+<h2 id="相关链接">相关链接</h2>
+
+<ul>
+ <li>其他坐标属性：{{domxref("DOMPoint.x", "x")}}，{{domxref("DOMPoint.y", "y")}}，{{domxref("DOMPoint.z", "z")}}.</li>
+</ul>