24 lines
726 B
JavaScript
24 lines
726 B
JavaScript
|
import { useState, useEffect } from 'react';
|
||
|
|
import { inView } from '../render/dom/viewport/index.mjs';
|
||
|
|
|
||
|
|
function useInView(ref, { root, margin, amount, once = false } = {}) {
|
||
|
|
const [isInView, setInView] = useState(false);
|
||
|
|
useEffect(() => {
|
||
|
|
if (!ref.current || (once && isInView))
|
||
|
|
return;
|
||
|
|
const onEnter = () => {
|
||
|
|
setInView(true);
|
||
|
|
return once ? undefined : () => setInView(false);
|
||
|
|
};
|
||
|
|
const options = {
|
||
|
|
root: (root && root.current) || undefined,
|
||
|
|
margin,
|
||
|
|
amount,
|
||
|
|
};
|
||
|
|
return inView(ref.current, onEnter, options);
|
||
|
|
}, [root, ref, margin, once, amount]);
|
||
|
|
return isInView;
|
||
|
|
}
|
||
|
|
|
||
|
|
export { useInView };
|