This is about the interface objects for SpeechSynthesis and SpeechSynthesisVoice, not about the functionality itself which was already supported. These interfaces should be exposed according to spec. Feature detection using window.speechSynthesis was already possible, but this makes feature detection using SpeechSynthesisVoice.prototype possible. Note that SpeechSynthesisEvent, SpeechSynthesisErrorEvent and SpeechSynthesisUtterance interface objects were already exposed.



Specification link

Specification being incubated in a Community Group

Status in Chromium


No active development (tracking bug)

Consensus & Standardization

After a feature ships in Chrome, the values listed here are not guaranteed to be up to date.


Last updated on 2021-06-29