SpeechSynthesis

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方法
事件
范例
规范
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这是实验性技术
检查浏览器兼容性表格要小心谨慎在生产中使用这之前。

SpeechSynthesis 接口在 Web 语音 API is the controller interface for the speech service; this can be used to retrieve information about the synthesis voices available on the device, start and pause speech, and other commands besides.

特性

SpeechSynthesis also inherits properties from its parent interface, EventTarget .

SpeechSynthesis.paused 只读: 布尔 that returns true 若 SpeechSynthesis object is in a paused state.
SpeechSynthesis.pending 只读: 布尔 that returns true if the utterance queue contains as-yet-unspoken utterances.
SpeechSynthesis.speaking 只读: 布尔 that returns true if an utterance is currently in the process of being spoken — even if SpeechSynthesis is in a paused state.

方法

SpeechSynthesis also inherits methods from its parent interface, EventTarget .

SpeechSynthesis.cancel()
SpeechSynthesis.getVoices(): Returns a list of SpeechSynthesisVoice objects representing all the available voices on the current device.
SpeechSynthesis.pause(): 放置 SpeechSynthesis object into a paused state.
SpeechSynthesis.resume(): 放置 SpeechSynthesis object into a non-paused state: resumes it if it was already paused.
SpeechSynthesis.speak(): 添加 utterance to the utterance queue; it will be spoken when any other utterances queued before it have been spoken.

事件

Listen to this event using addEventListener() 或通过把事件监听器赋值给 on eventname 特性为此接口。

voiceschanged: Fired when the list of SpeechSynthesisVoice objects that would be returned by the SpeechSynthesis.getVoices() method has changed.
也可用凭借 onvoiceschanged 特性。

范例

First, a simple example:

let utterance = new SpeechSynthesisUtterance("Hello world!");
speechSynthesis.speak(utterance);

Now we'll look at a more fully-fledged example. In our Speech synthesiser demo , we first grab a reference to the SpeechSynthesis controller using window.speechSynthesis . After defining some necessary variables, we retrieve a list of the voices available using SpeechSynthesis.getVoices() and populate a select menu with them so the user can choose what voice they want.

Inside the inputForm.onsubmit handler, we stop the form submitting with preventDefault() , create a new SpeechSynthesisUtterance instance containing the text from the text <input> , set the utterance's voice to the voice selected in the <select> element, and start the utterance speaking via the SpeechSynthesis.speak() 方法。

var synth = window.speechSynthesis;
var inputForm = document.querySelector('form');
var inputTxt = document.querySelector('.txt');
var voiceSelect = document.querySelector('select');
var pitch = document.querySelector('#pitch');
var pitchValue = document.querySelector('.pitch-value');
var rate = document.querySelector('#rate');
var rateValue = document.querySelector('.rate-value');
var voices = [];
function populateVoiceList() {
  voices = synth.getVoices();
  for(i = 0; i < 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;
}
inputForm.onsubmit = function(event) {
  event.preventDefault();
  var utterThis = new SpeechSynthesisUtterance(inputTxt.value);
  var selectedOption = voiceSelect.selectedOptions[0].getAttribute('data-name');
  for(i = 0; i < voices.length ; i++) {
    if(voices[i].name === selectedOption) {
      utterThis.voice = voices[i];
    }
  }
  utterThis.pitch = pitch.value;
  utterThis.rate = rate.value;
  synth.speak(utterThis);
  inputTxt.blur();
}

规范

规范	状态	注释
Web 语音 API The definition of 'SpeechSynthesis' in that specification.	草案

浏览器兼容性

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. 更新 GitHub 上的兼容性数据

	桌面						移动
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`SpeechSynthesis`	Chrome 33	Edge ≤18	Firefox 49	IE 不支持 No	Opera 21	Safari 7	WebView Android 4.4.3	Chrome Android 33	Firefox Android 62	Opera Android 不支持 No	Safari iOS 7	Samsung Internet Android 3.0
`cancel`	Chrome 33	Edge 14	Firefox 49	IE 不支持 No	Opera 21	Safari 7	WebView Android 4.4.3	Chrome Android 33	Firefox Android 62	Opera Android 不支持 No	Safari iOS 7	Samsung Internet Android 3.0
`getVoices`	Chrome 33	Edge 14	Firefox 49	IE 不支持 No	Opera 21	Safari 7	WebView Android 4.4.3	Chrome Android 33	Firefox Android 62	Opera Android 不支持 No	Safari iOS 7	Samsung Internet Android 3.0
`onvoiceschanged`	Chrome 33	Edge 14	Firefox 49	IE 不支持 No	Opera 不支持 No	Safari 不支持 No	WebView Android 4.4.3	Chrome Android 33	Firefox Android 62	Opera Android 不支持 No	Safari iOS 不支持 No	Samsung Internet Android 3.0
`pause`	Chrome 33	Edge 14	Firefox 49	IE 不支持 No	Opera 21	Safari 7	WebView Android 4.4.3 注意事项 4.4.3 注意事项 In Android, `pause()` ends the current utterance. `pause()` behaves the same as `cancel()` .	Chrome Android 33 注意事项 33 注意事项 In Android, `pause()` ends the current utterance. `pause()` behaves the same as `cancel()` .	Firefox Android 62 注意事项 62 注意事项 In Android, `pause()` ends the current utterance. `pause()` behaves the same as `cancel()` . 61 — 62 注意事项 Disabled In Android, `pause()` ends the current utterance. `pause()` behaves the same as `cancel()` . Disabled ). To change preferences in Firefox, visit about:config.	Opera Android 不支持 No	Safari iOS 7	Samsung Internet Android 3.0 注意事项 3.0 注意事项 In Android, `pause()` ends the current utterance. `pause()` behaves the same as `cancel()` .
`paused`	Chrome 33	Edge 14	Firefox 49	IE 不支持 No	Opera 21	Safari 7	WebView Android 4.4.3	Chrome Android 33	Firefox Android 62	Opera Android 不支持 No	Safari iOS 7	Samsung Internet Android 3.0
`pending`	Chrome 33	Edge 14	Firefox 49	IE 不支持 No	Opera 21	Safari 7	WebView Android 4.4.3	Chrome Android 33	Firefox Android 62	Opera Android 不支持 No	Safari iOS 7	Samsung Internet Android 3.0
`resume`	Chrome 33	Edge 14	Firefox 49	IE 不支持 No	Opera 21	Safari 7	WebView Android 4.4.3	Chrome Android 33	Firefox Android 62	Opera Android 不支持 No	Safari iOS 7	Samsung Internet Android 3.0
`speak`	Chrome 33	Edge 14	Firefox 49	IE 不支持 No	Opera 21	Safari 7	WebView Android 4.4.3	Chrome Android 33	Firefox Android 62	Opera Android 不支持 No	Safari iOS 7	Samsung Internet Android 3.0
`speaking`	Chrome 33	Edge 14	Firefox 49	IE 不支持 No	Opera 21	Safari 7	WebView Android 4.4.3	Chrome Android 33	Firefox Android 62	Opera Android 不支持 No	Safari iOS 7	Samsung Internet Android 3.0
`voiceschanged` event	Chrome 33	Edge 14	Firefox 49	IE 不支持 No	Opera 21	Safari 7	WebView Android 4.4.3	Chrome Android 33	Firefox Android 62	Opera Android 不支持 No	Safari iOS 7	Samsung Internet Android 3.0

图例

完整支持
不支持
实验。期望将来行为有所改变。

用户必须明确启用此特征。

另请参阅

Web 语音 API

元数据

最后修改： 2020 年 8 月 13 日

在此页

特性

方法

事件

范例

规范

浏览器兼容性

图例

另请参阅

相关话题