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be22d4d | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 | import { useEffect, useRef } from "react";
/**
* Hook that adds standard modal behaviors when `open` is true:
* - Escape key calls `onClose`
* - Body scroll is locked
* - Focus is restored to the previously focused element on close
*
* Returns a ref to attach to the modal container (for optional future focus trapping).
*/
export function useModalBehavior({
open,
onClose,
}: {
open: boolean;
onClose: () => void;
}) {
const containerRef = useRef<HTMLDivElement>(null);
useEffect(() => {
if (!open) return;
const prevActive = document.activeElement as HTMLElement | null;
const onKey = (e: KeyboardEvent) => {
if (e.key === "Escape") {
e.preventDefault();
onClose();
}
};
document.addEventListener("keydown", onKey);
const prevOverflow = document.body.style.overflow;
document.body.style.overflow = "hidden";
return () => {
document.removeEventListener("keydown", onKey);
document.body.style.overflow = prevOverflow;
prevActive?.focus?.();
};
}, [open, onClose]);
return containerRef;
}
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