div+css实现俄罗斯方块loading加载动画效果代码-html代码-BFW代码库

代码语言：html
代码描述：div+css实现俄罗斯方块loading加载动画效果代码
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<!DOCTYPE html>
<html lang="en" >
<head>
  <meta charset="UTF-8">

  <meta name="viewport" content="width=device-width, initial-scale=1, viewport-fit=cover">
<style>
    *,
*:before,
*:after {
  border: 0;
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --hue: 223;
  --bg: hsl(var(--hue),10%,90%);
  --fg: hsl(var(--hue),10%,10%);
  --red: hsl(3,90%,50%);
  --orange: hsl(33,90%,50%);
  --yellow: hsl(48,90%,50%);
  --green: hsl(123,90%,40%);
  --cyan: hsl(183,90%,40%);
  --blue: hsl(243,90%,50%);
  --purple: hsl(273,90%,50%);
  --trans-dur: 0.3s;
  font-size: calc(14px + (60 - 14) * (100vw - 280px) / (3840 - 280));
}

body {
  background-color: var(--bg);
  color: var(--fg);
  display: flex;
  font: 1em/1.5 sans-serif;
  height: 100vh;
  transition: background-color var(--trans-dur), color var(--trans-dur);
}

main {
  margin: auto;
  padding: 1.5em 0;
}

.tetris {
  animation-name: bounce;
  position: relative;
  width: 10em;
  height: 10.5em;
}
.tetris:after {
  background-color: hsl(var(--hue), 10%, 70%);
  content: "";
  display: block;
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 0.5em;
  transition: background-color var(--trans-dur);
}
.tetris, .tetris__block, .tetris__block-cell {
  animation-duration: 4s;
  animation-timing-function: cubic-bezier(0.65, 0, 0.35, 1);
  animation-iteration-count: infinite;
}
.tetris__block {
  display: grid;
  position: absolute;
  top: 0;
  left: 0;
  transform-origin: 1em 1em;
}
.tetris__block-cell {
  border: 0.25em solid rgba(0, 0, 0, 0);
  border-top-color: rgba(255, 255, 255, 0.3);
  border-right-color: rgba(0, 0, 0, 0.1);
  border-bottom-color: rgba(0, 0, 0, 0.1);
  border-left-color: rgba(255, 255, 255, 0.1);
}
.tetris__block-cell:nth-child(1) {
  grid-area: a;
}
.tetris__block-cell:nth-child(2) {
  grid-area: b;
}
.tetris__block-cell:nth-child(3) {
  grid-area: c;
}
.tetris__block-cell:nth-child(4) {
  grid-area: d;
}
.tetris__block--1 {
  animation-name: block1;
  grid-template-areas: "x a" "x b" "c d";
  grid-template-columns: repeat(2, 1fr);
  grid-template-rows: repeat(3, 1fr);
  width: 2em;
  height: 3em;
  transform: translate(7em, 7em);
}
.tetris__block--1 .tetris__block-cell {
  animation-name: block1-borders;
  background-color: var(--blue);
}
.tetris__block--2 {
  animation-name: block2;
  grid-template-areas: "a b c d";
  grid-template-columns: repeat(4, 1fr);
  grid-template-rows: repeat(1, 1fr);
  width: 4em;
  height: 1em;
  transform: translate(0em, 9em);
}
.tetris__block--2 .tetris__block-cell {
  background-color: var(--cyan);
}
.tetris__block--3 {
  animation-name: block3;
  grid-template-areas: "x a b" "c d y";
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(2, 1fr);
  width: 3em;
  height: 2em;
  transform: translate(5em, 8em);
}
.tetris__block--3 .tetris__block-cell {
  background-color: var(--green);
}
.tetris__block--4 {
  animation-name: block4;
  grid-template-areas: "a b" "c d";
  grid-template-columns: repeat(2, 1fr);
  grid-template-rows: repeat(2, 1fr);
  width: 2em;
  height: 2em;
  transform: translate(1em, 7em);
}
.tetris__block--4 .tetris__block-cell {
  background-color: var(--yellow);
}
.tetris__block--5 {
  animation-name: block5;
  grid-template-areas: "a x" "b c" "d y";
  grid-template-columns: repeat(2, 1fr);
  grid-template-rows: repeat(3, 1fr);
  width: 2em;
  height: 3em;
  transform: translate(4em, 7em);
}
.tetris__block--5 .tetris__block-cell {
  animation-name: block5-borders;
  background-color: var(--purple);
}
.tetris__block--6 {
  animation-name: block6;
  grid-template-areas: "a b x" "y c d";
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(2, 1fr);
  width: 3em;
  height: 2em;
  transform: translate(4em, 6em);
}
.tetris__block--6 .tetris__block-cell {
  background-color: var(--red);
}
.tetris__block--7 {
  animation-name: block7;
  grid-template-areas: "a b" "x c" "x d";
  grid-template-columns: repeat(2, 1fr);
  grid-template-rows: repeat(3, 1fr);
  width: 2em;
  height: 3em;
  transform: translate(2em, 6em);
}
.tetris__block--7 .tetris__block-cell {
  animation-name: block7-borders;
  background-color: var(--orange);
}
.tetris__block--8 {
  animation-name: block8;
  grid-template-areas: "a b c" "x d y";
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(2, 1fr);
  width: 3em;
  height: 2em;
  transform: translate(6em, 6em);
}
.tetris__block--8 .tetris__block-cell {
  animation-name: block8-borders;
  background-color: var(--purple);
}
.tetris__block--9 {
  animation-name: block9;
  grid-template-areas: "a b" "c x" "d x";
  grid-template-columns: repeat(2, 1fr);
  grid-template-rows: repeat(3, 1fr);
  width: 2em;
  height: 3em;
  transform: translate(0em, 6em);
}
.tetris__block--9 .tetris__block-cell {
  animation-name: block9-borders;
  background-color: var(--blue);
}
.tetris__block--10 {
  animation-name: block10;
  grid-template-areas: "a" "b" "c" "d";
  grid-template-columns: repeat(1, 1fr);
  grid-template-rows: repeat(4, 1fr);
  width: 1em;
  height: 4em;
  transform: translate(9em, 6em);
}
.tetris__block--10 .tetris__block-cell {
  animation-name: block10-borders;
  background-color: var(--cyan);
}

/* Dark theme */
@media (prefers-color-scheme: dark) {
  :root {
    --bg: hsl(var(--hue),10%,10%);
    --fg: hsl(var(--hue),10%,90%);
  }

  .tetris:after {
    background-color: hsl(var(--hue), 10%, 30%);
  }
}
/* Animations */
@keyframes bounce {
  from, 96%, to {
    animation-timing-function: linear;
    transform: translate(0, 0);
  }
  98% {
    animation-timing-function: cubic-bezier(0.33, 1, 0.68, 1);
    transform: translate(0, 1em);
  }
}
@keyframes block1 {
  from {
    transform: translate(5em, 0) rotate(90deg);
  }
  3.2% {
    transform: translate(7em, 0) rotate(90deg);
  }
  6.4% {
    animation-timing-function: cubic-bezier(0.32, 0, 0.67, 0);
    transform: translate(7em, 0) rotate(0);
  }
  9.6%, 98% {
    animation-timing-function: cubic-bezier(0.33, 1, 0.68, 1);
    opacity: 1;
    transform: translate(7em, 7em) rotate(0);
  }
  to {
    opacity: 0;
    transform: translate(7em, 7em) rotate(0);
  }
}
@keyframes block1-borders {
  from, 3.2% {
    border-top-color: rgba(0, 0, 0, 0.1);
    border-right-color: rgba(0, 0, 0, 0.1);
    border-bottom-color: rgba(255, 255, 255, 0.1);
    border-left-color: rgba(255, 255, 255, 0.3);
  }
  6.4%, to {
    border-top-color: rgba(255, 255, 255, 0.3);
    border-right-color: rgba(0, 0, 0, 0.1);
    border-bottom-color: rgba(0, 0, 0, 0.1);
    border-left-color: rgba(255, 255, 255, 0.1);
  }
}
@keyframes block2 {
  from {
    animation-timing-function: steps(1, end);
    visibility: hidden;
    transform: translate(3em, 0);
  }
  9.6% {
    animation-timing-function: cubic-bezier(0.65, 0, 0.35, 1);
    visibility: visible;
    transform: translate(3em, 0);
  }
  12.8% {
    transform: translate(0, 0);
  }
  16% {
    animation-timing-function: cubic-bezier(0.32, 0, 0.67, 0);
    transform: translate(0, 1em);
  }
  19.2%, 98% {
    animation-timing-function: cubic-bezier(0.33, 1, 0.68, 1);
    opacity: 1;
    transform: translate(0, 9em);
  }
  to {
    opacity: 0;
    transform: translate(0, 9em);
  }
}
@keyframes block3 {
  from {
    animation-timing-function: steps(1, end);
    visibility: hidden;
    transform: translate(4em, 0);
  }
  19.2% {
    animation-timing-function: cubic-bezier(0.65, 0, 0.35, 1);
    visibility: visible;
    transform: translate(4em, 0);
  }
  22.4% {
    transform: translate(5em, 0);
  }
  25.6% {
    animation-timing-function: cubic-bezier(0.32, 0, 0.67, 0);
    transform: translate(5em, 1em);
  }
  28.8%, 98% {
    animation-timing-function: cubic-bezier(0.33, 1, 0.68, 1);
    opacity: 1;
    transform: translate(5em, 8em);
  }
  to {
    opacity: 0;
    transform: translate(5em, 8em);
  }
}
@keyframes block4 {
  from {
    animation-timing-function: steps(1, end);
    visibility: hidden;
    transform: translate(5em, 0);
  }
  28.8% {
    animation-timing-function: cubic-bezier(0.65, 0, 0.35, 1);
    visibility: visible;
    transform: translate(5em, 0);
  }
  32% {
    transform: translate(0, 0);
  }
  35.2% {
    animation-timing-function: cubic-bezier(0.32, 0, 0.67, 0);
    transform: translate(1em, 0);
  }
  38.4%, 98% {
    animation-timing-function: cubic-bezier(0.33, 1, 0.68, 1);
    opacity: 1;
    transform: translate(1em, 7em);
  }
  to {
    opacity: 0;
    transform: translate(1em, 7em);
  }
}
@keyframes block5 {
  from {
    animation-timing-function: steps(1, end);
    visibility: hidden;
    transform: translate(5em, 0) rotate(90deg);
  }
  38.4% {
    animation-timing-function: cubic-bezier(0.65, 0, 0.35, 1);
    visibility: visible;
    transform: translate(5em, 0) rotate(90deg);
  }
  41.6% {
    transform: translate(4em, 0) rotate(90deg);
  }
  44.8% {
    animation-timing-function: cubic-bezier(0.32, 0, 0.67, 0);
    transform: translate(4em, 0) rotate(0);
  }
  48%, 98% {
    animation-t.........完整代码请登录后点击上方下载按钮下载查看