纯CSS流星雨效果

最近在我的小程序授权登录页加了一些好看的小样式，顺便分享出来

CSS

.xulgrrainbox {
  position: relative;
  width: 100%;
  height: 100%;
  transform: rotateZ(45deg);
  position: fixed;
  top: 0;
  left: 0;
}
.xulgr-rain {
  position: absolute;
  left: 50%;
  top: 50%;
  height: 2px;
  background: linear-gradient(-45deg, #5f91ff, rgba(0, 0, 255, 0));
  border-radius: 999px;
  filter: drop-shadow(0 0 6px #699bff);
  animation: tail 3s ease-in-out infinite, start 3s ease-in-out infinite;
}
.xulgr-rain::before {
  content: "";
  position: absolute;
  top: calc(50% - 1px);
  right: 0;
  height: 2px;
  background: linear-gradient(-45deg, rgba(0, 0, 255, 0), #5f91ff, rgba(0, 0, 255, 0));
  transform: translateX(50%) rotateZ(45deg);
  border-radius: 100%;
  animation: shining 3s ease-in-out infinite;
}
.xulgr-rain::after {
  content: "";
  position: absolute;
  top: calc(50% - 1px);
  right: 0;
  height: 2px;
  background: linear-gradient(-45deg, rgba(0, 0, 255, 0), #5f91ff, rgba(0, 0, 255, 0));
  transform: translateX(50%) rotateZ(45deg);
  border-radius: 100%;
  animation: shining 3s ease-in-out infinite;
  transform: translateX(50%) rotateZ(-45deg);
}
.xulgr-rain:nth-child(1) {
  top: calc(50% - 81px);
  left: calc(50% - 37px);
  animation-delay: 1023ms;
}
.xulgr-rain:nth-child(1)::before,
.xulgr-rain:nth-child(1)::after {
  animation-delay: 1023ms;
}
.xulgr-rain:nth-child(2) {
  top: calc(50% - 22px);
  left: calc(50% - 154px);
  animation-delay: 4673ms;
}
.xulgr-rain:nth-child(2)::before,
.xulgr-rain:nth-child(2)::after {
  animation-delay: 4673ms;
}
.xulgr-rain:nth-child(3) {
  top: calc(50% - 128px);
  left: calc(50% - 1px);
  animation-delay: 5495ms;
}
.xulgr-rain:nth-child(3)::before,
.xulgr-rain:nth-child(3)::after {
  animation-delay: 5495ms;
}
.xulgr-rain:nth-child(4) {
  top: calc(50% - 86px);
  left: calc(50% - 147px);
  animation-delay: 1132ms;
}
.xulgr-rain:nth-child(4)::before,
.xulgr-rain:nth-child(4)::after {
  animation-delay: 1132ms;
}
.xulgr-rain:nth-child(5) {
  top: calc(50% - -1px);
  left: calc(50% - 52px);
  animation-delay: 1517ms;
}
.xulgr-rain:nth-child(5)::before,
.xulgr-rain:nth-child(5)::after {
  animation-delay: 1517ms;
}
.xulgr-rain:nth-child(6) {
  top: calc(50% - 55px);
  left: calc(50% - 209px);
  animation-delay: 9108ms;
}
.xulgr-rain:nth-child(6)::before,
.xulgr-rain:nth-child(6)::after {
  animation-delay: 9108ms;
}
.xulgr-rain:nth-child(7) {
  top: calc(50% - 47px);
  left: calc(50% - 154px);
  animation-delay: 2702ms;
}
.xulgr-rain:nth-child(7)::before,
.xulgr-rain:nth-child(7)::after {
  animation-delay: 2702ms;
}
.xulgr-rain:nth-child(8) {
  top: calc(50% - 186px);
  left: calc(50% - 273px);
  animation-delay: 8824ms;
}
.xulgr-rain:nth-child(8)::before,
.xulgr-rain:nth-child(8)::after {
  animation-delay: 8824ms;
}
.xulgr-rain:nth-child(9) {
  top: calc(50% - 53px);
  left: calc(50% - 245px);
  animation-delay: 9125ms;
}
.xulgr-rain:nth-child(9)::before,
.xulgr-rain:nth-child(9)::after {
  animation-delay: 9125ms;
}
.xulgr-rain:nth-child(10) {
  top: calc(50% - 57px);
  left: calc(50% - 283px);
  animation-delay: 2233ms;
}
.xulgr-rain:nth-child(10)::before,
.xulgr-rain:nth-child(10)::after {
  animation-delay: 2233ms;
}
.xulgr-rain:nth-child(11) {
  top: calc(50% - -126px);
  left: calc(50% - 144px);
  animation-delay: 6880ms;
}
.xulgr-rain:nth-child(11)::before,
.xulgr-rain:nth-child(11)::after {
  animation-delay: 6880ms;
}
.xulgr-rain:nth-child(12) {
  top: calc(50% - -197px);
  left: calc(50% - 131px);
  animation-delay: 8614ms;
}
.xulgr-rain:nth-child(12)::before,
.xulgr-rain:nth-child(12)::after {
  animation-delay: 8614ms;
}
.xulgr-rain:nth-child(13) {
  top: calc(50% - -57px);
  left: calc(50% - 146px);
  animation-delay: 8211ms;
}
.xulgr-rain:nth-child(13)::before,
.xulgr-rain:nth-child(13)::after {
  animation-delay: 8211ms;
}
.xulgr-rain:nth-child(14) {
  top: calc(50% - 191px);
  left: calc(50% - 80px);
  animation-delay: 1686ms;
}
.xulgr-rain:nth-child(14)::before,
.xulgr-rain:nth-child(14)::after {
  animation-delay: 1686ms;
}
.xulgr-rain:nth-child(15) {
  top: calc(50% - -143px);
  left: calc(50% - 279px);
  animation-delay: 6485ms;
}
.xulgr-rain:nth-child(15)::before,
.xulgr-rain:nth-child(15)::after {
  animation-delay: 6485ms;
}
.xulgr-rain:nth-child(16) {
  top: calc(50% - 97px);
  left: calc(50% - 11px);
  animation-delay: 260ms;
}
.xulgr-rain:nth-child(16)::before,
.xulgr-rain:nth-child(16)::after {
  animation-delay: 260ms;
}
.xulgr-rain:nth-child(17) {
  top: calc(50% - -145px);
  left: calc(50% - 43px);
  animation-delay: 9745ms;
}
.xulgr-rain:nth-child(17)::before,
.xulgr-rain:nth-child(17)::after {
  animation-delay: 9745ms;
}
.xulgr-rain:nth-child(18) {
  top: calc(50% - 105px);
  left: calc(50% - 79px);
  animation-delay: 4761ms;
}
.xulgr-rain:nth-child(18)::before,
.xulgr-rain:nth-child(18)::after {
  animation-delay: 4761ms;
}
.xulgr-rain:nth-child(19) {
  top: calc(50% - -71px);
  left: calc(50% - 48px);
  animation-delay: 5821ms;
}
.xulgr-rain:nth-child(19)::before,
.xulgr-rain:nth-child(19)::after {
  animation-delay: 5821ms;
}
.xulgr-rain:nth-child(20) {
  top: calc(50% - -149px);
  left: calc(50% - 39px);
  animation-delay: 1116ms;
}
.xulgr-rain:nth-child(20)::before,
.xulgr-rain:nth-child(20)::after {
  animation-delay: 1116ms;
}
@keyframes tail {
  0% {
    width: 0;
  }
  30% {
    width: 100px;
  }
  100% {
    width: 0;
  }
}
@keyframes shining {
  0% {
    width: 0;
  }
  50% {
    width: 30px;
  }
  100% {
    width: 0;
  }
}
@keyframes start {
  0% {
    transform: translateX(0);
  }
  100% {
    transform: translateX(300px);
  }
}
@keyframes sky {
  0% {
    transform: rotate(45deg);
  }
  100% {
    transform: rotate(405deg);
  }
}

 

前端

<view class="xulgrrainbox">
  <view class="xulgr-rain"></view>
  <view class="xulgr-rain"></view>
  <view class="xulgr-rain"></view>
  <view class="xulgr-rain"></view>
  <view class="xulgr-rain"></view>
  <view class="xulgr-rain"></view>
  <view class="xulgr-rain"></view>
  <view class="xulgr-rain"></view>
  <view class="xulgr-rain"></view>
  <view class="xulgr-rain"></view>
  <view class="xulgr-rain"></view>
  <view class="xulgr-rain"></view>
  <view class="xulgr-rain"></view>
  <view class="xulgr-rain"></view>
  <view class="xulgr-rain"></view>
  <view class="xulgr-rain"></view>
  <view class="xulgr-rain"></view>
</view>

 

运行DEMO