From da78a9e329e272dedb2400b79a3bdeebff387d47 Mon Sep 17 00:00:00 2001
From: Peter Bengtsson <mail@peterbe.com>
Date: Tue, 8 Dec 2020 14:42:17 -0500
Subject: initial commit

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+---
+title: Kk
+slug: Web/API/SpeechSynthesis/onvoiceschanged
+translation_of: Web/API/SpeechSynthesis/onvoiceschanged
+---
+<div>{{APIRef("Web Speech API")}}{{SeeCompatTable}}</div>
+
+<p>The <code><strong>onvoiceschanged</strong></code> property of the {{domxref("SpeechSynthesis")}} interface represents an event handler that will run when the list of {{domxref("SpeechSynthesisVoice")}} objects that would be returned by the {{domxref("SpeechSynthesis.getVoices()")}} method has changed (when the <a href="/en-US/docs/Web/API/SpeechSynthesis/voiceschanged_event">voiceschanged</a> event fires.)</p>
+
+<p>This may occur when speech synthesis is being done on the server-side and the voices list is being determined asynchronously, or when client-side voices are installed/uninstalled while a speech synthesis application is running.</p>
+
+<h2 id="Syntax">Syntax</h2>
+
+<pre class="syntaxbox">speechSynthesisInstance.onvoiceschanged = function() { ... };
+</pre>
+
+<h2 id="Examples">Examples</h2>
+
+<p>This could be used to populate a list of voices that the user can choose between when the event fires (see our <a href="https://github.com/mdn/web-speech-api/blob/gh-pages/speak-easy-synthesis/script.js">Speak easy synthesis demo</a>.) Note that Firefox doesn't support it at present, and will just return a list of voices when {{domxref("SpeechSynthesis.getVoices()")}} is fired. With Chrome however, you have to wait for the event to fire before populating the list, hence the bottom if statement seen below.</p>
+
+<pre class="brush: js">var voices = [];
+
+function populateVoiceList() {
+  voices = synth.getVoices();
+
+  for(i = 0; i &lt; voices.length ; i++) {
+    var option = document.createElement('option');
+    option.textContent = voices[i].name + ' (' + voices[i].lang + ')';
+
+    if(voices[i].default) {
+      option.textContent += ' -- DEFAULT';
+    }
+
+    option.setAttribute('data-lang', voices[i].lang);
+    option.setAttribute('data-name', voices[i].name);
+    voiceSelect.appendChild(option);
+  }
+}
+
+populateVoiceList();
+if (speechSynthesis.onvoiceschanged !== undefined) {
+  speechSynthesis.onvoiceschanged = populateVoiceList;
+}</pre>
+
+<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('Web Speech API', '#dom-speechsynthesis-onvoiceschanged', 'onvoiceschanged')}}</td>
+   <td>{{Spec2('Web Speech API')}}</td>
+   <td></td>
+  </tr>
+ </tbody>
+</table>
+
+<h2 id="Browser_compatibility">Browser compatibility</h2>
+
+<div>
+
+
+<p>{{Compat("api.SpeechSynthesis.onvoiceschanged")}}</p>
+</div>
+
+<h2 id="See_also">See also</h2>
+
+<ul>
+ <li><a href="/en-US/docs/Web/API/Web_Speech_API">Web Speech API</a></li>
+</ul>
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