css警告栏动画

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css

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html

css

:root {
  --colour1: #f1c40f;
  --colour2: #2c3e50;
  --speed: 4s;
}

html,
body {
  height: 100%;background-color: #1E1E1E
}

@-webkit-keyframes slide {
  from {
    background-position-x: 0;
  }
  to {
    background-position-x: 113px;
  }
}

@keyframes slide {
  from {
    background-position-x: 0;
  }
  to {
    background-position-x: 113px;
  }
}
.container {
  height: 100%;
  display: -webkit-box;
  display: flex;
  -webkit-box-pack: center;
          justify-content: center;
  -webkit-box-align: center;
          align-items: center;
}
.container .bar {
  min-height: 100px;
  border-radius: 10px;
  width: calc(113px * 4);
  box-shadow: 0px 10px 13px -6px #2c3e50;
  background-color: var(--colour2);
  background-image: repeating-linear-gradient(45deg, transparent, transparent 40px, var(--colour1) 40px, var(--colour1) 80px);
  -webkit-animation: slide var(--speed) linear infinite;
          animation: slide var(--speed) linear infinite;
  will-change: background-position;
}
@media only screen and (max-width: 450px) {
  .container .bar {
    width: calc(113px * 3);
  }
}
@media only screen and (max-width: 350px) {
  .container .bar {
    width: calc(113px * 2);
  }
}

JavaScript

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