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+---
+title: Navigator.deviceMemory
+slug: Web/API/Navigator/deviceMemory
+translation_of: Web/API/Navigator/deviceMemory
+---
+<p>{{SeeCompatTable}}{{APIRef("Device Memory")}}</p>
+
+<p><strong><code>deviceMemory</code></strong> 只读属性返回千兆字节为单位的大概的机器内存。这个值是一个2的次方数除以1024，舍去小数点的近似值。并且，上下边界也用来保护那些拥有非常低端或者高端设备的用户的隐私。</p>
+
+<h2 id="语法">语法</h2>
+
+<pre class="syntaxbox notranslate">const <em>memory</em> = navigator.deviceMemory
+console.log ("This device has at least " + memory + "GiB of RAM.")
+</pre>
+
+<h3 id="Value">Value</h3>
+
+<p>一个浮点类型的数,0.25,0.5,1,2,4,8之一.</p>
+
+<h2 id="Specifications">Specifications</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('Device Memory','#sec-device-memory-js-api','deviceMemory')}}</td>
+   <td>{{Spec2('Device Memory')}}</td>
+   <td>Initial definition.</td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="Browser_compatibility">Browser compatibility</h2>
+
+<div class="hidden">此页上的兼容性表是从结构化数据生成的。如果你想对数据有所贡献，请查看https://github.com/mdn/browser-compat-data并向我们发送请求</div>
+
+<p>{{Compat("api.Navigator.deviceMemory")}}</p>