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。
volume
特性为
SpeechSynthesisUtterance
interface gets and sets the volume that the utterance will be spoken at.
If not set, the default value 1 will be used.
var myVolume = speechSynthesisUtteranceInstance.volume; speechSynthesisUtteranceInstance.volume = 0.5;
A float that represents the volume value, between 0 (lowest) and 1 (highest.)
若 SSML is used, this value will be overridden by prosody tags in the markup.
var synth = window.speechSynthesis;
var inputForm = document.querySelector('form');
var inputTxt = document.querySelector('input');
var voiceSelect = document.querySelector('select');
var voices = synth.getVoices();
...
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.volume = 0.5;
synth.speak(utterThis);
inputTxt.blur();
}
| 规范 | 状态 | 注释 |
|---|---|---|
|
Web 语音 API
The definition of 'volume' in that specification. |
草案 |
| 桌面 | 移动 | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
volume
|
Chrome 33 | Edge 14 | Firefox 49 | IE 不支持 No | Opera 21 | Safari 7 | WebView Android 不支持 No | Chrome Android 33 | Firefox Android 62 | Opera Android 不支持 No | Safari iOS 7 | Samsung Internet Android 3.0 |
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。