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| 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 46 47 48 49 50 51 | 728x 728x 728x 699x 579x 579x 579x 579x 699x 699x 699x 660x 660x 728x | import { useRef, useState, useEffect, RefObject } from 'react';
/**
* Calculates the maximum height for an element based on its position
* relative to the bottom of the viewport.
*
* @param data The data that, when changed, should trigger a recalculation.
* @param buffer Optional buffer space (in pixels) to leave below the element. Defaults to 20.
* @param minHeight Optional minimum height (in pixels) for the element. Defaults to 100.
* @returns An object containing:
* - `ref`: A RefObject to attach to the target DOM element.
* - `maxHeight`: The calculated maximum height string (e.g., "500px").
*/
export function useDynamicMaxHeight(
data: any,
buffer = 20,
minHeight = 100
): {
ref: RefObject<HTMLDivElement>;
maxHeight: string;
} {
const ref = useRef<HTMLDivElement>(null);
const [maxHeight, setMaxHeight] = useState<string>('100vh'); // Start with full viewport height initially
useEffect(() => {
const calculateMaxHeight = () => {
if (ref.current) {
const rect = ref.current.getBoundingClientRect();
const availableHeight = window.innerHeight - rect.top - buffer;
setMaxHeight(`${Math.max(minHeight, availableHeight)}px`);
}
};
// Calculate initially
// Use requestAnimationFrame to ensure layout is stable after initial render
const rafId = requestAnimationFrame(calculateMaxHeight);
// Recalculate on window resize
window.addEventListener('resize', calculateMaxHeight);
// Cleanup listener and requestAnimationFrame on component unmount
return () => {
window.removeEventListener('resize', calculateMaxHeight);
cancelAnimationFrame(rafId);
};
// Dependencies: buffer, minHeight, and data.
}, [data, buffer, minHeight]);
return { ref, maxHeight };
}
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