粘性加载动画

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html

css

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html

css

html, body {
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
}

body {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  background: #030303;
}

svg {
  display: none;
}

.blobs {
  -webkit-filter: url(#goo);
          filter: url(#goo);
  width: 300px;
  height: 300px;
  position: relative;
  overflow: hidden;
  border-radius: 70px;
}
.blobs .blob-center {
  position: absolute;
  background: #FFF200;
  top: 50%;
  left: 50%;
  width: 30px;
  height: 30px;
  -webkit-transform-origin: left top;
          transform-origin: left top;
  -webkit-transform: scale(0.9) translate(-50%, -50%);
          transform: scale(0.9) translate(-50%, -50%);
  -webkit-animation: blob-grow linear 3.4s infinite;
          animation: blob-grow linear 3.4s infinite;
  border-radius: 50%;
  box-shadow: 0 -10px 40px -5px #FFF200;
}

.blob {
  position: absolute;
  background: #FFF200;
  top: 50%;
  left: 50%;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  -webkit-animation: blobs ease-out 3.4s infinite;
          animation: blobs ease-out 3.4s infinite;
  -webkit-transform: scale(0.9) translate(-50%, -50%);
          transform: scale(0.9) translate(-50%, -50%);
  -webkit-transform-origin: center top;
          transform-origin: center top;
  opacity: 0;
}
.blob:nth-child(1) {
  -webkit-animation-delay: 0.2s;
          animation-delay: 0.2s;
}
.blob:nth-child(2) {
  -webkit-animation-delay: 0.4s;
          animation-delay: 0.4s;
}
.blob:nth-child(3) {
  -webkit-animation-delay: 0.6s;
          animation-delay: 0.6s;
}
.blob:nth-child(4) {
  -webkit-animation-delay: 0.8s;
          animation-delay: 0.8s;
}
.blob:nth-child(5) {
  -webkit-animation-delay: 1s;
          animation-delay: 1s;
}

@-webkit-keyframes blobs {
  0% {
    opacity: 0;
    -webkit-transform: scale(0) translate(calc(-330px - 50%), -50%);
            transform: scale(0) translate(calc(-330px - 50%), -50%);
  }
  1% {
    opacity: 1;
  }
  35%,65% {
    opacity: 1;
    -webkit-transform: scale(0.9) translate(-50%, -50%);
            transform: scale(0.9) translate(-50%, -50%);
  }
  99% {
    opacity: 1;
  }
  100% {
    opacity: 0;
    -webkit-transform: scale(0) translate(calc(330px - 50%), -50%);
            transform: scale(0) translate(calc(330px - 50%), -50%);
  }
}

@keyframes blobs {
  0% {
    opacity: 0;
    -webkit-transform: scale(0) translate(calc(-330px - 50%), -50%);
            transform: scale(0) translate(calc(-330px - 50%), -50%);
  }
  1% {
    opacity: 1;
  }
  35%,65% {
    opacity: 1;
    -webkit-transform: scale(0.9) translate(-50%, -50%);
            transform: scale(0.9) translate(-50%, -50%);
  }
  99% {
    opacity: 1;
  }
  100% {
    opacity: 0;
    -webkit-transform: scale(0) translate(calc(330px - 50%), -50%);
            transform: scale(0) translate(calc(330px - 50%), -50%);
  }
}
@-webkit-keyframes blob-grow {
  0%,  39% {
    -webkit-transform: scale(0) translate(-50%, -50%);
            transform: scale(0) translate(-50%, -50%);
  }
  40%, 42% {
    -webkit-transform: scale(1, 0.9) translate(-50%, -50%);
            transform: scale(1, 0.9) translate(-50%, -50%);
  }
  43%, 44% {
    -webkit-transform: scale(1.2, 1.1) translate(-50%, -50%);
            transform: scale(1.2, 1.1) translate(-50%, -50%);
  }
  45%, 46% {
    -webkit-transform: scale(1.3, 1.2) translate(-50%, -50%);
            transform: scale(1.3, 1.2) translate(-50%, -50%);
  }
  47%, 48% {
    -webkit-transform: scale(1.4, 1.3) translate(-50%, -50%);
            transform: scale(1.4, 1.3) translate(-50%, -50%);
  }
  52% {
    -webkit-transform: scale(1.5, 1.4) translate(-50%, -50%);
            transform: scale(1.5, 1.4) translate(-50%, -50%);
  }
  54% {
    -webkit-transform: scale(1.7, 1.6) translate(-50%, -50%);
            transform: scale(1.7, 1.6) translate(-50%, -50%);
  }
  58% {
    -webkit-transform: scale(1.8, 1.7) translate(-50%, -50%);
            transform: scale(1.8, 1.7) translate(-50%, -50%);
  }
  68%, 70% {
    -webkit-transform: scale(1.7, 1.5) translate(-50%, -50%);
            transform: scale(1.7, 1.5) translate(-50%, -50%);
  }
  78% {
    -webkit-transform: scale(1.6, 1.4) translate(-50%, -50%);
            transform: scale(1.6, 1.4) translate(-50%, -50%);
  }
  80%, 81% {
    -webkit-transform: scale(1.5, 1.4) translate(-50%, -50%);
            transform: scale(1.5, 1.4) translate(-50%, -50%);
  }
  82%, 83% {
    -webkit-transform: scale(1.4, 1.3) translate(-50%, -50%);
            transform: scale(1.4, 1.3) translate(-50%, -50%);
  }
  84%, 85% {
    -webkit-transform: scale(1.3, 1.2) translate(-50%, -50%);
            transform: scale(1.3, 1.2) translate(-50%, -50%);
  }
  86%, 87% {
    -webkit-transform: scale(1.2, 1.1) translate(-50%, -50%);
            transform: scale(1.2, 1.1) translate(-50%, -50%);
  }
  90%, 91% {
    -webkit-transform: scale(1, 0.9) translate(-50%, -50%);
            transform: scale(1, 0.9) translate(-50%, -50%);
  }
  92%, 100% {
    -webkit-transform: scale(0) translate(-50%, -50%);
            transform: scale(0) translate(-50%, -50%);
  }
}
@keyframes blob-grow {
  0%,  39% {
    -webkit-transform: scale(0) translate(-50%, -50%);
            transform: scale(0) translate(-50%, -50%);
  }
  40%, 42% {
    -webkit-transform: scale(1, 0.9) translate(-50%, -50%);
            transform: scale(1, 0.9) translate(-50%, -50%);
  }
  43%, 44% {
    -webkit-transform: scale(1.2, 1.1) translate(-50%, -50%);
            transform: scale(1.2, 1.1) translate(-50%, -50%);
  }
  45%, 46% {
    -webkit-transform: scale(1.3, 1.2) translate(-50%, -50%);
            transform: scale(1.3, 1.2) translate(-50%, -50%);
  }
  47%, 48% {
    -webkit-transform: scale(1.4, 1.3) translate(-50%, -50%);
            transform: scale(1.4, 1.3) translate(-50%, -50%);
  }
  52% {
    -webkit-transform: scale(1.5, 1.4) translate(-50%, -50%);
            transform: scale(1.5, 1.4) translate(-50%, -50%);
  }
  54% {
    -webkit-transform: scale(1.7, 1.6) translate(-50%, -50%);
            transform: scale(1.7, 1.6) translate(-50%, -50%);
  }
  58% {
    -webkit-transform: scale(1.8, 1.7) translate(-50%, -50%);
            transform: scale(1.8, 1.7) translate(-50%, -50%);
  }
  68%, 70% {
    -webkit-transform: scale(1.7, 1.5) translate(-50%, -50%);
            transform: scale(1.7, 1.5) translate(-50%, -50%);
  }
  78% {
    -webkit-transform: scale(1.6, 1.4) translate(-50%, -50%);
            transform: scale(1.6, 1.4) translate(-50%, -50%);
  }
  80%, 81% {
    -webkit-transform: scale(1.5, 1.4) translate(-50%, -50%);
            transform: scale(1.5, 1.4) translate(-50%, -50%);
  }
  82%, 83% {
    -webkit-transform: scale(1.4, 1.3) translate(-50%, -50%);
            transform: scale(1.4, 1.3) translate(-50%, -50%);
  }
  84%, 85% {
    -webkit-transform: scale(1.3, 1.2) translate(-50%, -50%);
            transform: scale(1.3, 1.2) translate(-50%, -50%);
  }
  86%, 87% {
    -webkit-transform: scale(1.2, 1.1) translate(-50%, -50%);
            transform: scale(1.2, 1.1) translate(-50%, -50%);
  }
  90%, 91% {
    -webkit-transform: scale(1, 0.9) translate(-50%, -50%);
            transform: scale(1, 0.9) translate(-50%, -50%);
  }
  92%, 100% {
    -webkit-transform: scale(0) translate(-50%, -50%);
            transform: scale(0) translate(-50%, -50%);
  }
}

JavaScript

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