Intersection Observer for check position of element

checkVisability.js

  const checkVisability = target => {
    const io = new IntersectionObserver((entries, observer) => {
      console.log(entries)
      entries.forEach(entry => {

        if (entry.isIntersecting) {
          console.log('visible');

          // observer.disconnect();
        } else {
          console.log('unvisible');

        }
      });
    });

    io.observe(target)
  };

  checkVisability(quoteTable);

source https://fireship.io/snippets/intersection-observer-lazy-load-images/