CSS动画进度条

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html

css

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html

css

@property --progress-value {
  syntax: "<integer>";
  inherits: true;
  initial-value: 0;
}
:root {
  --progress-bar-color: #cfd8dc;
  --progress-value-color: #2196f3;
  --progress-empty-color-h: 4.1;
  --progress-empty-color-s: 89.6;
  --progress-empty-color-l: 58.4;
  --progress-filled-color-h: 122.4;
  --progress-filled-color-s: 39.4;
  --progress-filled-color-l: 49.2;
}

html, body {
  height: 100%;
  margin: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
}

body {
  justify-content: space-evenly;
  max-height: 300px;
  width: 100%;
  max-width: 400px;
  font-family: "Roboto Mono", monospace;background-color: #1F1F1F;
}

progress[value] {
  display: block;
  position: relative;
  -webkit-appearance: none;
     -moz-appearance: none;
          appearance: none;
  width: 80%;
  height: 6px;
  border: 0;
  --border-radius: 10px;
  border-radius: var(--border-radius);
  counter-reset: progress var(--progress-value);
  --progress-value-string: counter(progress) "%";
  --progress-max-decimal: calc(var(--value, 0) / var(--max, 0));
  --progress-value-decimal: calc(var(--progress-value, 0) / var(--max, 0));
  --progress-value-percent: calc(var(--progress-value-decimal) * 100%);
  --progress-value-color: hsl(
    calc((var(--progress-empty-color-h) + (var(--progress-filled-color-h) - var(--progress-empty-color-h)) * var(--progress-value-decimal)) * 1deg)
    calc((var(--progress-empty-color-s) + (var(--progress-filled-color-s) - var(--progress-empty-color-s)) * var(--progress-value-decimal)) * 1%)
    calc((var(--progress-empty-color-l) + (var(--progress-filled-color-l) - var(--progress-empty-color-l)) * var(--progress-value-decimal)) * 1%)
  );
  -webkit-animation: calc(3s * var(--progress-max-decimal)) linear 0.5s 1 normal both progress;
          animation: calc(3s * var(--progress-max-decimal)) linear 0.5s 1 normal both progress;
}
@supports selector(::-moz-progress-bar) {
  progress[value] {
    --progress-value-decimal: calc(var(--value, 0) / var(--max, 0));
  }
}

progress[value]::-webkit-progress-bar {
  background-color: var(--progress-bar-color);
  border-radius: var(--border-radius);
  overflow: hidden;
}

progress[value]::-webkit-progress-value {
  width: var(--progress-value-percent) !important;
  background-color: var(--progress-value-color);
  border-radius: var(--border-radius);
}

progress[value]::-moz-progress-bar {
  width: var(--progress-value-percent) !important;
  background-color: var(--progress-value-color);
  border-radius: var(--border-radius);
}

progress[value]::after {
  display: flex;
  align-items: center;
  justify-content: center;
  --size: 32px;
  width: var(--size);
  height: var(--size);
  position: absolute;
  left: var(--progress-value-percent);
  top: 50%;
  transform: translate(-50%, -50%);
  background-color: var(--progress-value-color);
  border-radius: 50%;
  content: attr(value);
  content: var(--progress-value-string, var(--value));
  font-size: 12px;
  font-weight: 700;
  color: #fff;
}

@-webkit-keyframes progress {
  from {
    --progress-value: 0;
  }
  to {
    --progress-value: var(--value);
  }
}

@keyframes progress {
  from {
    --progress-value: 0;
  }
  to {
    --progress-value: var(--value);
  }
}

JavaScript

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