hooks useOnScreen.ts

16.66% Statements 2/12

0% Branches 0/1

0% Functions 0/4

18.18% Lines 2/11

Press n or j to go to the next uncovered block, b, p or k for the previous block.


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23 13x
 
6x
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  import { RefObject, useEffect, useState } from "react";
 
export function useOnScreen(
  ref: RefObject<HTMLElement>,
  rootMargin?: string
): boolean {
  const [isIntersecting, setIsIntersecting] = useState(false);
 
  useEffect(() => {
    Iif (!ref.current) return;
    const observer = new IntersectionObserver(
      ([entry]) => setIsIntersecting(entry.isIntersecting),
      { rootMargin }
    );
    observer.observe(ref.current);
    return () => {
      observer.disconnect();
    };
  }, [ref, rootMargin]);
 
  return isIntersecting;
}