Progress Bar

An indeterminate progress bar strip that slides back and forth inside a track. Ideal for showing ongoing background operations like file uploads, API calls, or build processes.

Generated using Grepped's AI UI component generator — created from scratch, not pulled from a library.

progressbarindeterminateloading

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Design Intent

An indeterminate progress bar strip for showing ongoing background operations.

CSS

css
.track {
      width: 240px;
      height: 6px;
      background: #27272a;
      border-radius: 3px;
      overflow: hidden;
    }
    .fill {
      height: 100%;
      width: 30%;
      background: #3b82f6;
      border-radius: 3px;
      animation: run 1.2s ease-in-out infinite;
    }
    @keyframes run {
      0% { transform: translateX(-100%); }
      100% { transform: translateX(400%); }
    }
    body { margin: 0; min-height: 100vh; display: flex; align-items: center; justify-content: center; background: #0f0f0f; }

HTML

html
<div class="track"><div class="fill"></div></div>

Full Source

html
<!DOCTYPE html>
<html>
<head>
  <style>
    .track {
      width: 240px;
      height: 6px;
      background: #27272a;
      border-radius: 3px;
      overflow: hidden;
    }
    .fill {
      height: 100%;
      width: 30%;
      background: #3b82f6;
      border-radius: 3px;
      animation: run 1.2s ease-in-out infinite;
    }
    @keyframes run {
      0% { transform: translateX(-100%); }
      100% { transform: translateX(400%); }
    }
    body { margin: 0; min-height: 100vh; display: flex; align-items: center; justify-content: center; background: #0f0f0f; }
  </style>
</head>
<body>
  <div class="track"><div class="fill"></div></div>
</body>
</html>

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