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return `usePrompt` capabilities from react-router
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/** | |
* Prompts a user when they exit the page | |
*/ | |
import { useCallback, useContext, useEffect } from 'react'; | |
import { UNSAFE_NavigationContext as NavigationContext } from 'react-router-dom'; | |
function useConfirmExit(confirmExit: () => boolean, when = true) { | |
const { navigator } = useContext(NavigationContext); | |
useEffect(() => { | |
if (!when) { | |
return; | |
} | |
const push = navigator.push; | |
navigator.push = (...args: Parameters<typeof push>) => { | |
const result = confirmExit(); | |
if (result !== false) { | |
push(...args); | |
} | |
}; | |
return () => { | |
navigator.push = push; | |
}; | |
}, [navigator, confirmExit, when]); | |
} | |
export function usePrompt(message: string, when = true) { | |
useEffect(() => { | |
if (when) { | |
window.onbeforeunload = function () { | |
return message; | |
}; | |
} | |
return () => { | |
window.onbeforeunload = null; | |
}; | |
}, [message, when]); | |
const confirmExit = useCallback(() => { | |
const confirm = window.confirm(message); | |
return confirm; | |
}, [message]); | |
useConfirmExit(confirmExit, when); | |
} |
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@denchiklut useBlocker and usePrompt don't work with routers that don't have access to the new data API, like BrowserRouter component, this gist does