Hotodogo | Snippets: Stars Animation

@keyframes stars {
    0% {
        opacity: 0;
        transform: translateY(40px)
    }

    50% {
        opacity: 1;
        transform: translateY(10px) scale(1.4)
    }

    to {
        opacity: 1
    }
}
html { font-size: 20px; background: #fff; }
body {
	min-height: 100vh;
	display: flex;
	flex-flow: column nowrap;
	align-items: center;
	justify-content: center;
}
.star-box {
    position: relative;
    display: flex;
    flex-flow: column nowrap;
    align-items: center;
    justify-content: center;
    width: 70%;
    height: 180px;
    margin: 10px auto;
    border: 1px solid #d3e0da;
    border-radius: 4px;
    word-break: break-all;
    background: #F8FAF9;
    font-family: Nunito,sans-serif;
}

.star-box span {
    display: block;
    font-size: 30px;
    padding: 30px;
}

.star-box a {
    color: #fff !important;
    text-shadow: 0 1px 2px rgba(0,0,0,.4);
    border-radius: 6px;
    font-size: 20px;
    padding: 14px 18px;
    display: inline-block;
    background: linear-gradient(175deg,#d69721,#f08827 37%,#edad69);
    background: linear-gradient(175deg,#2198d6,#6996ed);
    font-weight: 700;
    text-decoration: none !important;
    transition: all .2s ease;
}

.star-box a:hover {
    opacity: 0.9;
}

.star-box .star-animation {
    -webkit-animation: stars 1s 1 forwards;
    animation: stars 1s 1 forwards;
}

.star-box .star {
    position: absolute;
    width: 60px;
    top: 0;
    opacity: 1
    z-index: 999;
}

.star-box .star-1 {
    top: 25%;
    left: -28px;
    transform: rotate(-14deg)
}

.star-box .star-2 {
    top: -6px;
    left: 4.5%;
    width: 30px;
    transform: rotate(15deg);
    -webkit-animation-delay: .1s;
    animation-delay: .1s
}

.star-box .star-3 {
    top: auto;
    bottom: 58px;
    right: -15px;
    transform: rotate(15deg);
    -webkit-animation-delay: .2s;
    animation-delay: .2s
}

.star-box .star-4 {
    width: 40px;
    bottom: -14px;
    top: auto;
    right: 5px;
    transform: rotate(5deg);
    -webkit-animation-delay: .3s;
    animation-delay: .3s
}

.star-box .star-5 {
    width: 30px;
    bottom: 26px;
    top: auto;
    right: 10px;
    transform: rotate(-27deg);
    -webkit-animation-delay: .4s;
    animation-delay: .4s
}

CSS Before Head

HTML Head

CSS After Head

JS Before HTML Body

<div class="star-box">
    <span>Star Animation</span>
    <a href="https://caveops.com/" target="_blank">Check it out</a>
    <img class="star star-1" src="data:image/svg+xml;charset=UTF-8,%3csvg width='100%25' height='100%25' viewBox='0 0 77 68' version='1.1' xmlns='http://www.w3.org/2000/svg' xmlns:xlink='http://www.w3.org/1999/xlink' xml:space='preserve' xmlns:serif='http://www.serif.com/' style='fill-rule:evenodd;clip-rule:evenodd;stroke-linejoin:round;stroke-miterlimit:2;'%3e%3cg transform='matrix(3.04466,0,0,3.24785,-18.0325,-31.9862)'%3e%3cpath d='M18.581,10.334L22.516,16.638L30.595,17.96L24.948,23.179L26.006,30.3L18.581,27.221L11.156,30.3L12.214,23.179L6.567,17.96L14.646,16.638L18.581,10.334Z' style='fill:rgb(238,180,65);'/%3e%3c/g%3e%3c/svg%3e" />
    <img class="star star-2" src="data:image/svg+xml;charset=UTF-8,%3csvg width='100%25' height='100%25' viewBox='0 0 77 68' version='1.1' xmlns='http://www.w3.org/2000/svg' xmlns:xlink='http://www.w3.org/1999/xlink' xml:space='preserve' xmlns:serif='http://www.serif.com/' style='fill-rule:evenodd;clip-rule:evenodd;stroke-linejoin:round;stroke-miterlimit:2;'%3e%3cg transform='matrix(3.04466,0,0,3.24785,-18.0325,-31.9862)'%3e%3cpath d='M18.581,10.334L22.516,16.638L30.595,17.96L24.948,23.179L26.006,30.3L18.581,27.221L11.156,30.3L12.214,23.179L6.567,17.96L14.646,16.638L18.581,10.334Z' style='fill:rgb(238,180,65);'/%3e%3c/g%3e%3c/svg%3e" />
    <img class="star star-3" src="data:image/svg+xml;charset=UTF-8,%3csvg width='100%25' height='100%25' viewBox='0 0 77 68' version='1.1' xmlns='http://www.w3.org/2000/svg' xmlns:xlink='http://www.w3.org/1999/xlink' xml:space='preserve' xmlns:serif='http://www.serif.com/' style='fill-rule:evenodd;clip-rule:evenodd;stroke-linejoin:round;stroke-miterlimit:2;'%3e%3cg transform='matrix(3.04466,0,0,3.24785,-18.0325,-31.9862)'%3e%3cpath d='M18.581,10.334L22.516,16.638L30.595,17.96L24.948,23.179L26.006,30.3L18.581,27.221L11.156,30.3L12.214,23.179L6.567,17.96L14.646,16.638L18.581,10.334Z' style='fill:rgb(238,180,65);'/%3e%3c/g%3e%3c/svg%3e" />
    <img class="star star-4" src="data:image/svg+xml;charset=UTF-8,%3csvg width='100%25' height='100%25' viewBox='0 0 77 68' version='1.1' xmlns='http://www.w3.org/2000/svg' xmlns:xlink='http://www.w3.org/1999/xlink' xml:space='preserve' xmlns:serif='http://www.serif.com/' style='fill-rule:evenodd;clip-rule:evenodd;stroke-linejoin:round;stroke-miterlimit:2;'%3e%3cg transform='matrix(3.04466,0,0,3.24785,-18.0325,-31.9862)'%3e%3cpath d='M18.581,10.334L22.516,16.638L30.595,17.96L24.948,23.179L26.006,30.3L18.581,27.221L11.156,30.3L12.214,23.179L6.567,17.96L14.646,16.638L18.581,10.334Z' style='fill:rgb(238,180,65);'/%3e%3c/g%3e%3c/svg%3e" />
    <img class="star star-5" src="data:image/svg+xml;charset=UTF-8,%3csvg width='100%25' height='100%25' viewBox='0 0 77 68' version='1.1' xmlns='http://www.w3.org/2000/svg' xmlns:xlink='http://www.w3.org/1999/xlink' xml:space='preserve' xmlns:serif='http://www.serif.com/' style='fill-rule:evenodd;clip-rule:evenodd;stroke-linejoin:round;stroke-miterlimit:2;'%3e%3cg transform='matrix(3.04466,0,0,3.24785,-18.0325,-31.9862)'%3e%3cpath d='M18.581,10.334L22.516,16.638L30.595,17.96L24.948,23.179L26.006,30.3L18.581,27.221L11.156,30.3L12.214,23.179L6.567,17.96L14.646,16.638L18.581,10.334Z' style='fill:rgb(238,180,65);'/%3e%3c/g%3e%3c/svg%3e" />
</div>

HTML Body

HTML Foot

const observer_star = new IntersectionObserver(function(entries) {
    entries.forEach(entry => {
        const stars = entry.target.querySelectorAll('.star');
        stars.forEach(star => {
            if (entry.isIntersecting) {
                star.classList.add('star-animation');
                return;
            }
            star.classList.remove('star-animation');
        });
    });
});

observer_star.observe(document.querySelector('.star-box'));

JS After HTML Body