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+---
+title: NetworkInformation
+slug: Web/API/NetworkInformation
+tags:
+  - API
+translation_of: Web/API/NetworkInformation
+---
+<div>{{APIRef("Network Information API")}}{{SeeCompatTable}}</div>
+
+<p>The <code><strong>NetworkInformation</strong></code> interface provides information about the connection a device is using to communicate with the network and provides a means for scripts to be notified if the connection type changes. The <code>NetworkInformation</code> interfaces cannot be instantiated. It is instead accessed through the <code>connection</code> property of the {{domxref("Navigator")}} interface.</p>
+
+<p>{{AvailableInWorkers}}</p>
+
+<h2 id="Properties">Properties</h2>
+
+<p><em>This interface also inherits properties of its parent, {{domxref("EventTarget")}}.</em></p>
+
+<dl>
+ <dd>
+ <ul>
+ </ul>
+ </dd>
+ <dt>{{domxref("NetworkInformation.downlink")}} {{readonlyinline}}</dt>
+ <dd>Returns the effective bandwidth estimate in megabits per second, rounded to the nearest multiple of 25 kilobits per seconds.</dd>
+ <dt>{{domxref("NetworkInformation.downlinkMax")}} {{readonlyinline}}</dt>
+ <dd>Returns the maximum downlink speed, in megabits per second (Mbps), for the underlying connection technology.</dd>
+ <dt>{{domxref("NetworkInformation.effectiveType")}} {{readonlyinline}}</dt>
+ <dd>Returns the effective type of the connection meaning one of 'slow-2g', '2g', '3g', or '4g'. This value is determined using a combination of recently observed round-trip time and downlink values.</dd>
+ <dt>{{domxref("NetworkInformation.rtt")}} {{readonlyinline}}</dt>
+ <dd>Returns the estimated effective round-trip time of the current connection, rounded to the nearest multiple of 25 milliseconds.</dd>
+ <dt>{{domxref("NetworkInformation.saveData")}} {{readonlyinline}}</dt>
+ <dd>Returns <code>true</code> if the user has set a reduced data usage option on the user agent.</dd>
+ <dt>{{domxref("NetworkInformation.type")}} {{readonlyinline}}</dt>
+ <dd>Returns the type of connection a device is using to communicate with the network. It will be one of the following values:
+ <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>
+</dl>
+
+<h3 id="Event_handlers">Event handlers</h3>
+
+<dl>
+ <dt>{{domxref("NetworkInformation.onchange")}}</dt>
+ <dd>The event that's fired when connection information changes and the {{event("change")}} is fired on this object.</dd>
+</dl>
+
+<h2 id="Methods">Methods</h2>
+
+<p><em>This interface also inherits methods of its parent, {{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', '#-dfn-networkinformation-dfn-interface', 'NetworkInformation')}}</td>
+   <td>{{Spec2('Network Information')}}</td>
+   <td>Initial definition</td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="Browser_compatibility">Browser compatibility</h2>
+
+
+
+<p>{{Compat("api.NetworkInformation")}}</p>
+
+<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>