agneym · June 30, 2018 15:57
diff --git a/intersection-intro.js b/intersection-intro.js
 const observer = new IntersectionObserver(callback);
 const target = document.querySelector('#target');

 observer.observe(target);

 function callback(entries) {
  //  Do action here
 }
	const observer = new IntersectionObserver(callback);
	const target = document.querySelector('#target');

	observer.observe(target);

	function callback(entries) {
	// Do action here
	}