@vhsys-ui/use-scroll-position
Version:
Provides the logic to control the scroll over an element
47 lines (46 loc) • 1.48 kB
JavaScript
// src/index.ts
import { useRef, useEffect } from "react";
var isBrowser = typeof window !== "undefined";
function getScrollPosition(element) {
if (!isBrowser)
return { x: 0, y: 0 };
if (!element) {
return { x: window.scrollX, y: window.scrollY };
}
return { x: element.scrollLeft, y: element.scrollTop };
}
var useScrollPosition = (props) => {
const { elementRef, delay = 30, callback, isEnabled } = props;
const position = useRef(
isEnabled ? getScrollPosition(elementRef == null ? void 0 : elementRef.current) : { x: 0, y: 0 }
);
let throttleTimeout = null;
const handler = () => {
const currPos = getScrollPosition(elementRef == null ? void 0 : elementRef.current);
if (typeof callback === "function") {
callback({ prevPos: position.current, currPos });
}
position.current = currPos;
throttleTimeout = null;
};
useEffect(() => {
if (!isEnabled)
return;
const handleScroll = () => {
if (delay) {
if (throttleTimeout === null) {
throttleTimeout = setTimeout(handler, delay);
}
} else {
handler();
}
};
const target = (elementRef == null ? void 0 : elementRef.current) || window;
target.addEventListener("scroll", handleScroll);
return () => target.removeEventListener("scroll", handleScroll);
}, [elementRef == null ? void 0 : elementRef.current, delay, isEnabled]);
return position.current;
};
export {
useScrollPosition
};