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+---
+title: RTCPeerConnection.onaddstream
+slug: Web/API/RTCPeerConnection/addstream_event
+translation_of: Web/API/RTCPeerConnection/onaddstream
+original_slug: Web/API/RTCPeerConnection/onaddstream
+---
+<p>{{APIRef("WebRTC")}}{{SeeCompatTable}}</p>
+
+<p><code><strong>当类型为</strong></code>{{domxref("MediaStreamEvent")}}的{{event("addstream")}} 事件发生时，通过{{domxref("RTCPeerConnection")}}触发<code><strong>RTCPeerConnection.onaddstream</strong></code> 事件处理函数。当远程媒体流{{domxref("MediaStream")}} 添加到连接后发送事件。当{{domxref("RTCPeerConnection.setRemoteDescription()")}} 后此事件立即被调用而不需要等待SDP交换完成。</p>
+
+<h2 id="语法">语法</h2>
+
+<pre class="eval"><em>peerconnection</em>.onaddstream = <em>function</em>;
+</pre>
+
+<h3 id="值">值</h3>
+
+<ul>
+ <li><code>function</code> 是用户自定义的一个函数，写法上不带 <code>()</code> 和任何参数，也可以是一个匿名函数，例如 <code>function(event) {...}</code>。事件处理函数通常有个event做参数，类型为 {{domxref("MediaStreamEvent")}}.</li>
+</ul>
+
+<h2 id="例子">例子</h2>
+
+<pre class="brush: js">pc.onaddstream = function(ev) { alert("onaddstream event detected!"); };
+</pre>
+
+<h2 id="Specifications" name="Specifications">规范</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('WebRTC 1.0', '#widl-RTCPeerConnection-onaddstream', 'RTCPeerConnection.onaddstream') }}</td>
+   <td>{{ Spec2('WebRTC 1.0') }}</td>
+   <td>Initial specification.</td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="浏览器兼容性">浏览器兼容性</h2>
+
+{{Compat("api.RTCPeerConnection.onaddstream")}}
+
+<h2 id="扩展阅读">扩展阅读</h2>
+
+<ul>
+ <li>The {{event("addstream")}} event and its type, {{domxref("MediaStreamEvent")}}.</li>
+</ul>