37 lines
1.1 KiB
TypeScript
37 lines
1.1 KiB
TypeScript
import { useEffect, useState } from "react";
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// Define general type for useWindowSize hook, which includes width and height
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interface Size {
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width: number | undefined;
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height: number | undefined;
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}
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// Hook
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function useWindowSize(): Size {
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// Initialize state with undefined width/height so server and client renders match
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// Learn more here: https://joshwcomeau.com/react/the-perils-of-rehydration/
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const [windowSize, setWindowSize] = useState<Size>({
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width: undefined,
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height: undefined,
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});
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useEffect(() => {
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// Handler to call on window resize
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function handleResize() {
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// Set window width/height to state
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setWindowSize({
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width: window.innerWidth,
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height: window.innerHeight,
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});
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}
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// Add event listener
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window.addEventListener("resize", handleResize);
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// Call handler right away so state gets updated with initial window size
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handleResize();
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// Remove event listener on cleanup
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return () => window.removeEventListener("resize", handleResize);
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}, []); // Empty array ensures that effect is only run on mount
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return windowSize;
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}
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export default useWindowSize;
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