关于loading 的一个css样式

 animation: threeBounceDelay 1.4s infinite ease-in-out;

animation-fill-mode: both;

@keyframes threeBounceDelay {
0%,100%,80% {
-webkit-transform: scale(0)
}

40% {
-webkit-transform: scale(1)
}
}

@keyframes stretchdelay {
0%,100%,40% {
transform: scaleY(.4);
-webkit-transform: scaleY(.4)
}

20% {
transform: scaleY(1);
-webkit-transform: scaleY(1)
}
}