---
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>



<p>{{Compat("api.Navigator.deviceMemory")}}</p>