SpeechSynthesisEvent: charLength property
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since September 2022.
The read-only charLength property of the SpeechSynthesisEvent interface returns the number of characters left to be spoken after the character at the charIndex position.
If the speech engine can't determine it, it returns 0.
Value
An integer.
Examples
js
utterThis.onpause = (event) => {
const char = event.utterance.text.charAt(event.charIndex);
const charLeft = event.charLength;
if (charLeft) {
console.log(
`Speech paused. There are still ${charLeft} characters to be spoken.`,
);
} else {
console.log(
"Speech paused. The underlying speech engine can't tell how many characters are left.",
);
}
};
Specifications
| Specification |
|---|
| Web Speech API # dom-speechsynthesisevent-charlength |
Browser compatibility
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charLength
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Legend
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- Full support
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