This demo uses the experimental Web Speech API, which is currently only supported by Blink-based browsers including Chrome 25+, Opera 27+, Samsung Internet, QQ Browser, and Baidu Browser.
View the demo on Vimeo
This is how this web app works:
SpeechRecognitioninterface to listen your voice from a microphone
SpeechSynthesisinterface to give it a synthetic voice.
.env and fill the env vars:
The first one is an API.ai API key (Please get one by sign up with API.ai), and the second one is a session ID, which is an arbitraryf string.
Or use this Heroku button to deploy to Heroku server. You just need to fill out the env vars with the API key and a session ID. No need to create an