反转动画

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html

css

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html

css

@charset "utf-8";
html {
  background-color: gray;
}

ul {
  width: 100%;
  -webkit-transform: translate(0, -50%);
          transform: translate(0, -50%);
  position: absolute;
  text-align: center;
  font-size: 0;
  left: 0;
  top: 50%;
}
ul li {
  display: inline-block;
  position: relative;
  text-align: center;
  line-height: 15vw;
  margin: 2vw 0;
  height: 15vw;
  width: 15vw;
}
@media screen and (orientation: landscape) {
  ul li {
    line-height: 15vh;
    margin: 2vh 0;
    height: 15vh;
    width: 15vh;
  }
}
ul li:before, ul li:after {
  -webkit-transition: -webkit-transform 0.25s ease-in-out;
  transition: -webkit-transform 0.25s ease-in-out;
  transition: transform 0.25s ease-in-out;
  transition: transform 0.25s ease-in-out, -webkit-transform 0.25s ease-in-out;
  content: attr(data-letter);
  font-family: sans-serif;
  font-weight: 100;
  font-size: 3vw;
  position: absolute;
  height: 100%;
  width: 100%;
  left: 0;
  top: 0;
}
@media screen and (orientation: landscape) {
  ul li:before, ul li:after {
    font-size: 3vh;
  }
}
ul li[data-letter=" "] {
  opacity: 0;
}
ul li:before {
  -webkit-transform-origin: top center;
          transform-origin: top center;
  -webkit-transform: translate(0, 100%) rotateX(-90deg);
          transform: translate(0, 100%) rotateX(-90deg);
  background-color: black;
  z-index: 1;
  color: white;
}
ul li:after {
  -webkit-transform: translate(0, 0) rotateX(0deg);
          transform: translate(0, 0) rotateX(0deg);
  -webkit-transform-origin: bottom center;
          transform-origin: bottom center;
  background-color: white;
  z-index: 1;
  color: black;
}
ul li:nth-of-type(10n+1):before {
  -webkit-transition-delay: 0s;
          transition-delay: 0s;
}
ul li:nth-of-type(10n+2):before {
  -webkit-transition-delay: 0.05s;
          transition-delay: 0.05s;
}
ul li:nth-of-type(10n+3):before {
  -webkit-transition-delay: 0.1s;
          transition-delay: 0.1s;
}
ul li:nth-of-type(10n+4):before {
  -webkit-transition-delay: 0.15s;
          transition-delay: 0.15s;
}
ul li:nth-of-type(10n+5):before {
  -webkit-transition-delay: 0.2s;
          transition-delay: 0.2s;
}
ul li:nth-of-type(10n+6):before {
  -webkit-transition-delay: 0.25s;
          transition-delay: 0.25s;
}
ul li:nth-of-type(10n+7):before {
  -webkit-transition-delay: 0.3s;
          transition-delay: 0.3s;
}
ul li:nth-of-type(10n+8):before {
  -webkit-transition-delay: 0.35s;
          transition-delay: 0.35s;
}
ul li:nth-of-type(10n+9):before {
  -webkit-transition-delay: 0.4s;
          transition-delay: 0.4s;
}
ul li:nth-of-type(10n+10):before {
  -webkit-transition-delay: 0.45s;
          transition-delay: 0.45s;
}
ul li:nth-of-type(10n+1):after {
  -webkit-transition-delay: 0s;
          transition-delay: 0s;
}
ul li:nth-of-type(10n+2):after {
  -webkit-transition-delay: 0.05s;
          transition-delay: 0.05s;
}
ul li:nth-of-type(10n+3):after {
  -webkit-transition-delay: 0.1s;
          transition-delay: 0.1s;
}
ul li:nth-of-type(10n+4):after {
  -webkit-transition-delay: 0.15s;
          transition-delay: 0.15s;
}
ul li:nth-of-type(10n+5):after {
  -webkit-transition-delay: 0.2s;
          transition-delay: 0.2s;
}
ul li:nth-of-type(10n+6):after {
  -webkit-transition-delay: 0.25s;
          transition-delay: 0.25s;
}
ul li:nth-of-type(10n+7):after {
  -webkit-transition-delay: 0.3s;
          transition-delay: 0.3s;
}
ul li:nth-of-type(10n+8):after {
  -webkit-transition-delay: 0.35s;
          transition-delay: 0.35s;
}
ul li:nth-of-type(10n+9):after {
  -webkit-transition-delay: 0.4s;
          transition-delay: 0.4s;
}
ul li:nth-of-type(10n+10):after {
  -webkit-transition-delay: 0.45s;
          transition-delay: 0.45s;
}

html.active ul li:before {
  -webkit-transform: translate(0, 0) rotateX(0deg);
          transform: translate(0, 0) rotateX(0deg);
  z-index: 2;
}
html.active ul li:after {
  -webkit-transform: translate(0, -100%) rotateX(90deg);
          transform: translate(0, -100%) rotateX(90deg);
  z-index: 1;
}
html.active ul li:after[data-letter=" "] {
  opacity: 0;
}

JavaScript

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