Files
mqtt-explorer/app/src/effects/useGlobalKeyEventHandler.tsx
2019-06-24 11:22:50 +02:00

25 lines
658 B
TypeScript

import { useEffect } from 'react'
import { KeyCodes } from '../utils/KeyCodes'
export function useGlobalKeyEventHandler(
key: KeyCodes | undefined,
callback: (event: KeyboardEvent) => void,
dependencies?: Array<any>
) {
useEffect(() => {
function handleKeyEvent(event: KeyboardEvent) {
if (key === undefined) {
callback(event)
} else if (event.keyCode === key) {
callback(event)
event.preventDefault()
}
}
document.addEventListener('keydown', handleKeyEvent, false)
return function cleanup() {
document.removeEventListener('keydown', handleKeyEvent, false)
}
}, dependencies)
}