react-use/src/useWindowScroll.ts

42 lines
857 B
TypeScript

import {useState, useEffect, useRef} from 'react';
import {isClient} from './util';
export interface State {
x: number;
y: number;
}
const useWindowScroll = (): State => {
const frame = useRef(0);
const [state, setState] = useState<State>({
x: isClient ? window.scrollX : 0,
y: isClient ? window.scrollY : 0
})
useEffect(() => {
const handler = () => {
cancelAnimationFrame(frame.current)
frame.current = requestAnimationFrame(() => {
setState({
x: window.scrollX,
y: window.scrollY
})
})
}
window.addEventListener('scroll', handler, {
capture: false,
passive: true
})
return () => {
cancelAnimationFrame(frame.current);
window.removeEventListener('scroll', handler);
};
}, [])
return state
}
export default useWindowScroll