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Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

            
              .slide.slide--intro
	h1 Intersection Observer Demo
	p (scroll please)

.slide
	.box.box--spin
		span Spin
	
.slide
	.box.box--grow
		span Grow
	
.slide
	.box.box--move-right
		span Move Right
            
          
!
            
              .slide
	display flex
	align-items center
	justify-content center

	min-height 100vh
	
.slide--intro
	flex-direction column
	
.box
	display flex
	align-items center
	justify-content center
	
	width 150px
	height 150px
	
	color white
	text-align center
	
	background-color DeepPink
	transition transform 1s ease-in
	
.box--spin.box--visible
	transform rotate(1080deg)
	
.box--grow.box--visible
	transform scale(1.5)
	
.box--move-right.box--visible
	transform translateX(50px)
            
          
!
            
              // callback function to do animations
const scrollImations = (entries, observer) => {
	entries.forEach((entry) => {
		// only do animation if the element is fully on screen
		if(entry.isIntersecting && entry.intersectionRatio == 1) {
			entry.target.classList.add('box--visible');
		} else {
			entry.target.classList.remove('box--visible');
		}
	});
}

// create the observer
const options = {
	threshold: 1.0,
};
const observer = new IntersectionObserver(scrollImations, options);

// target the elements to be observed
const boxes = document.querySelectorAll('.box');
boxes.forEach((box) => {
	observer.observe(box);
});
            
          
!
999px
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