SpeechSynthesisUtterance: volume プロパティ
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since September 2018.
Please help us by answering a few questions.
volume
は SpeechSynthesisUtterance
インターフェイスのプロパティで、発話の音量を取得および設定します。
未設定の場合、既定値の 1 が使用されます。
値
例
js
const synth = window.speechSynthesis;
const inputForm = document.querySelector("form");
const inputTxt = document.querySelector("input");
const voiceSelect = document.querySelector("select");
const voices = synth.getVoices();
// ...
inputForm.onsubmit = (event) => {
event.preventDefault();
const utterThis = new SpeechSynthesisUtterance(inputTxt.value);
const selectedOption =
voiceSelect.selectedOptions[0].getAttribute("data-name");
for (let i = 0; i < voices.length; i++) {
if (voices[i].name === selectedOption) {
utterThis.voice = voices[i];
}
}
utterThis.volume = 0.5;
synth.speak(utterThis);
inputTxt.blur();
};
仕様書
Specification |
---|
Web Speech API # dom-speechsynthesisutterance-volume |