@carbon/react/es/internal/useEvent.js

React components for the Carbon Design System

/**
 * Copyright IBM Corp. 2016, 2026
 *
 * This source code is licensed under the Apache-2.0 license found in the
 * LICENSE file in the root directory of this source tree.
 */

import { useEffect, useRef } from "react";
//#region src/internal/useEvent.ts
/**
* Copyright IBM Corp. 2016, 2025
*
* This source code is licensed under the Apache-2.0 license found in the
* LICENSE file in the root directory of this source tree.
*/
const useEvent = (elementOrRef, eventName, callback) => {
	const savedCallback = useRef(null);
	useEffect(() => {
		savedCallback.current = callback;
	}, [callback]);
	useEffect(() => {
		const element = "current" in elementOrRef ? elementOrRef.current : elementOrRef;
		if (!element) return;
		const handler = (event) => {
			if (savedCallback.current) savedCallback.current(event);
		};
		element.addEventListener(eventName, handler);
		return () => {
			element.removeEventListener(eventName, handler);
		};
	}, [elementOrRef, eventName]);
};
const useWindowEvent = (eventName, callback) => {
	const savedCallback = useRef(null);
	useEffect(() => {
		savedCallback.current = callback;
	}, [callback]);
	useEffect(() => {
		const handler = (event) => {
			if (savedCallback.current) savedCallback.current(event);
		};
		window.addEventListener(eventName, handler);
		return () => {
			window.removeEventListener(eventName, handler);
		};
	}, [eventName]);
};
//#endregion
export { useEvent, useWindowEvent };