CSS3实现跳动的动画效果

//css3新知识

display: flex;

justify-content: center;

align-items: center;

animation: shadow .5s linear infinite;

@keyframes shadow {

0%, 100% {transform: scaleX(1);}

50% {transform: scaleX(1.2);}

}

body{
background:#bbd149;
margin: 0;
height: 100vh;
display: flex;
justify-content: center;
align-items: center;
}
.box{
height: 50px;
width: 50px;
position: relative;
}
.box::before{
content: ”;
height: 8px; width: 50px; background: #000; opacity: .2; border-radius: 50%;
position: absolute;
top: 67px;
left: 0;
animation: shadow .5s linear infinite;
}
.box::after{
border-radius: 5px;
background: #fff;
animation: rotate .5s linear infinite;
content: ”;
position: absolute;
left: 0;
top: 0;
width: 50px;
height: 50px;
}
@keyframes shadow {
0%, 100% {transform: scaleX(1);}
50% {transform: scaleX(1.2);}
}

@keyframes rotate {
0% {
transform: translateY(0) rotate(0deg);
}
25% {
transform: translateY(10px) rotate(22.5deg);
}
50% {
transform: translateY(20px) scale(1.1, 0.9) rotate(45deg);
border-bottom-right-radius: 50px;
}
75% {
ransform: translateY(10px) rotate(67.5deg);
}
100% {
transform: translateY(0) rotate(90deg);
}
}