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* Copyright 2021 Harness Inc. All rights reserved.
* Use of this source code is governed by the PolyForm Shield 1.0.0 license
* that can be found in the licenses directory at the root of this repository, also available at
* https://polyformproject.org/wp-content/uploads/2020/06/PolyForm-Shield-1.0.0.txt.
*/
import { useEffect, useRef } from 'react'
export type EventHandler<K extends keyof WindowEventMap> = (ev: WindowEventMap[K]) => void
export function useGlobalEventListener<K extends keyof WindowEventMap>(
type: K,
handler: EventHandler<K>,
options?: AddEventListenerOptions
): void {
const savedHandler = useRef<EventHandler<K> | undefined>()
useEffect(() => {
savedHandler.current = handler
}, [handler])
useEffect(() => {
const eventListener = (event: WindowEventMap[K]): void => {
Eif (typeof savedHandler.current === 'function') {
savedHandler.current(event)
}
}
window.addEventListener(type, eventListener, options)
return (): void => {
window.removeEventListener(type, eventListener, options)
}
})
}
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