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+---
+title: NetworkInformation
+slug: Web/API/NetworkInformation
+translation_of: Web/API/NetworkInformation
+---
+<div>{{APIRef("Network Information API")}}{{SeeCompatTable}}</div>
+
+<p><code><strong>NetworkInformation</strong></code> 提供有关设备正在使用的连接与网络进行通信的信息，并提供了在连接类型更改时通知脚本的事件。<code>NetworkInformation</code> 接口不能被是实例化， 而是通过 {{domxref("Navigator")}} 的 <code>connection</code> 属性进行访问。</p>
+
+<p>{{AvailableInWorkers}}</p>
+
+<h2 id="Properties">Properties</h2>
+
+<p><em>这些属性接口继承自 {{domxref("EventTarget")}}.</em></p>
+
+<dl>
+ <dt>{{domxref("NetworkInformation.type")}} {{readonlyinline}}</dt>
+ <dd>返回设备正在与网络进行通信的连接类型。 它将是以下值之一：
+ <ul>
+  <li><code>bluetooth</code></li>
+  <li><code>cellular</code></li>
+  <li><code>ethernet</code></li>
+  <li><code>none</code></li>
+  <li><code>wifi</code></li>
+  <li><code>wimax</code></li>
+  <li><code>other</code></li>
+  <li><code>unknown</code></li>
+ </ul>
+ </dd>
+ <dt>{{domxref("NetworkInformation.downlinkMax")}} {{readonlyinline}}</dt>
+ <dd>返回基础连接技术的最大下载速度（Mbps）。</dd>
+</dl>
+
+<h3 id="Event_handlers">Event handlers</h3>
+
+<dl>
+ <dt>{{domxref("NetworkInformation.onchange")}}</dt>
+ <dd>当连接信息更改并在此对象上触发更改时触发的 {{event("change")}}  。</dd>
+</dl>
+
+<h2 id="Methods">Methods</h2>
+
+<p><em>这些属性接口同样继承自 {{domxref("EventTarget")}}.</em></p>
+
+<h2 id="Specifications">Specifications</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('Network Information', '#idl-def-NetworkInformation', 'NetworkInformation')}}</td>
+   <td>{{Spec2('Network Information')}}</td>
+   <td>Initial definition</td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="Browser_compatibility">Browser compatibility</h2>
+
+<p>{{CompatibilityTable}}</p>
+
+<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</th>
+  </tr>
+  <tr>
+   <td>Basic support</td>
+   <td>20 {{property_prefix("webkit")}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</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>Firefox Mobile (Gecko)</th>
+   <th>IE Mobile</th>
+   <th>Opera Mobile</th>
+   <th>Safari Mobile</th>
+   <th>Chrome for Android</th>
+  </tr>
+  <tr>
+   <td>Basic support</td>
+   <td>{{CompatVersionUnknown}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatGeckoMobile(31)}} {{property_prefix("moz")}}<sup>[1]</sup></td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatVersionUnknown}}</td>
+  </tr>
+  <tr>
+   <td>Available in workers</td>
+   <td>{{CompatUnknown}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatGeckoMobile(53)}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatNo}}</td>
+   <td>{{CompatUnknown}}</td>
+  </tr>
+ </tbody>
+</table>
+</div>
+
+<h2 id="See_also">See also</h2>
+
+<ul>
+ <li><a href="/en-US/docs/Web/API/Network_Information_API">Network Information API</a></li>
+ <li><a href="/en-US/docs/Online_and_offline_events">Online and offline events</a></li>
+ <li>The {{domxref("Navigator")}} interface that implements it.</li>
+</ul>