SpeechSynthesisEvent: charIndex 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.

charIndexSpeechSynthesisUtterance インターフェイスの読み取り専用プロパティで、イベントが発生したときに発話されていた SpeechSynthesisUtterance.text 内の文字のインデックス位置を返します。

数値です。

js
utterThis.onpause = (event) => {
  const char = event.utterance.text.charAt(event.charIndex);
  console.log(
    `Speech paused at character ${event.charIndex} of "${event.utterance.text}", which is "${char}".`,
  );
};

仕様書

Specification
Web Speech API
# dom-speechsynthesisevent-charindex

ブラウザーの互換性

Report problems with this compatibility data on GitHub
desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
charIndex

Legend

Tip: you can click/tap on a cell for more information.

Full support
Full support
No support
No support

関連情報