@untemps/react-vocal

@untemps/react-vocal

React component to initiate a SpeechRecognition session.

Disclaimer

The Web Speech API is supported by Chrome only so far. On other browsers, the Vocal component won't display anything.

Installation

yarn add @untemps/react-vocal

Usage

Import the Vocal component:

import Vocal from '@untemps/react-vocal'

Instantiate it:

const App = () => {
	const [result, setResult] = useState('')

	const _onVocalStart = () => {
		setResult('')
	}

	const _onVocalResult = (result) => {
		setResult(result)
	}

	return (
		<div className="App">
			<span style={{ position: 'relative' }}>
				<Vocal
					onStart={_onVocalStart}
					onResult={_onVocalResult}
					style={{ width: 16, position: 'absolute', right: 10, top: -2 }}
				/>
				<input defaultValue={result} style={{ width: 300, height: 40 }} />
			</span>
		</div>
	)
}

By default, Vocal displays an icon with two states (idle/listening):

But you can provide your own component:

const App = () => {
	const [isListening, setIsListening] = useState('')

	const _onSpeechStart = () => {
		setIsListening(true)
	}

	const _onSpeechEnd = () => {
		setIsListening(false)
	}

	return (
		<Vocal onSpeechStart={_onSpeechStart} onSpeechEnd={_onSpeechEnd}>
			{isListening ? 'Waiting for vocal' : <button>Click to speech</button>}
		</Vocal>
	)
}

The component passed as children must respect the following constraints:

• Be a single valid element. Neither array of elements nor string.
• Accept a onClick handler used to trigger the recognition session. If the component provides its own onClick callback, it will be overridden by the Vocal component implementation.

API

Props	Type	Default	Description
timeout	number	3000	Defines the time in ms to wait before discarding the recognition
style	object	null	Defines the styles of the default element if className is not specified
className	string	null	Defines the class of the default element
onStart	func	null	Defines the handler called when the recognition starts
onEnd	func	null	Defines the handler called when the recognition ends
onSpeechStart	func	null	Defines the handler called when the speech starts
onSpeechEnd	func	null	Defines the handler called when the speech ends
onResult	func	null	Defines the handler called when a result is recognized
onError	func	null	Defines the handler called when an error occurs
onNoMatch	func	null	Defines the handler called when no result can be recognized

Todos

• Rewrite with TypeScript
• Expose SpeechRecognition properties via props
• Add a connector management to plug external speech-to-text services in

Changelog

1.0.1 (2020-06-17)

Bug Fixes

• Fix crash in useEffect when SpeechRecognition is not supported (f322b8c)