This is an experimental technologyCheck the Browser compatibility table carefully before using this in production.
The charIndex
read-only property of the SpeechSynthesisUtterance
interface returns the index position of the character in the SpeechSynthesisUtterance.text
that was being spoken when the event was triggered.
Syntax
event.charIndex;
Value
A number.
Examples
utterThis.onpause = function(event) {
var char = event.utterance.text.charAt(event.charIndex);
console.log('Speech paused at character ' + event.charIndex + ' of "' +
event.utterance.text + '", which is "' + char + '".');
}
Specifications
Specification | Status | Comment |
Web Speech APIThe definition of 'charIndex' in that specification. | Draft |
Browser compatibility
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.
Update compatibility data on GitHub
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Chrome
Full support 33 |
Edge
Full support 14 |
Firefox
Full support 49 |
IE
No support No |
Opera
Full support 21 |
Safari
Full support 7 |
WebView Android
No support No |
Chrome Android
Full support 33 |
Firefox Android Full support 62 Full support 62 No support 61 — 62 Disabled' From version 61 until version 62 (exclusive): this feature is behind the |
Opera Android
No support No |
Safari iOS
Full support 7 |
Samsung Internet Android
Full support 3.0 |
Legend
- Full support
- Full support
- No support
- No support
- Experimental. Expect behavior to change in the future.'
- Experimental. Expect behavior to change in the future.
- User must explicitly enable this feature.'
- User must explicitly enable this feature.
See also
SpeechSynthesisEvent.charIndex by Mozilla Contributors is licensed under CC-BY-SA 2.5.