HTML-Element-Collection/loading-spinner.html at main · Shubham713-lab/HTML-Element-Collection · GitHub

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<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8" />
  <meta name="viewport" content="width=device-width,initial-scale=1" />
  <title>Standalone CSS Spinner</title>
  <style>
    /* --spinner-size and --spinner-color are the customization hooks */
    :root {
      --spinner-size: 48px;
      --spinner-color: #2563eb; /* blue */
    }

    /* Wrapper to place spinner centrally in demo page */
    .demo {
      min-height: 100vh;
      display: grid;
      place-items: center;
      background: #f8fafc;
      margin: 0;
      font-family: system-ui, -apple-system, "Segoe UI", Roboto, Arial;
    }

    /* Spinner component */
    .spinner {
      width: var(--spinner-size);
      height: var(--spinner-size);
      display: inline-block;
      position: relative;
      /* keep the spinner accessible */
      aria-hidden: true;
    }

    /* Outer ring */
    .spinner .ring {
      box-sizing: border-box;
      width: 100%;
      height: 100%;
      border-radius: 50%;
      border: calc(var(--spinner-size) / 8) solid rgba(0,0,0,0.08);
      border-top-color: var(--spinner-color);
      animation: spin 0.8s linear infinite;
    }

    /* Optional inner dot for a nicer look — can be removed if minimal needed */
    .spinner .dot {
      position: absolute;
      left: 50%;
      top: 50%;
      transform: translate(-50%,-50%);
      width: calc(var(--spinner-size) / 5);
      height: calc(var(--spinner-size) / 5);
      border-radius: 50%;
      background: var(--spinner-color);
      opacity: 0.15;
    }

    @keyframes spin {
      to { transform: rotate(360deg); }
    }

    /* Utility small/large variants if repo wants classes instead of CSS vars */
    .spinner--sm { --spinner-size: 24px; }
    .spinner--md { --spinner-size: 48px; }
    .spinner--lg { --spinner-size: 72px; }

    /* High-contrast theme friendliness — spinner respects current color scheme */
    @media (prefers-color-scheme: dark) {
      .demo { background: #0b1220; color: #e6eef8; }
      /* fallback color for dark mode if not set by user */
      :root { --spinner-color: #60a5fa; }
    }
  </style>
</head>
<body>
  <div class="demo">
    <!-- Example usage: change size & color with inline style or class -->
    <div class="spinner spinner--md" style="--spinner-color: #ea580c;" role="status" aria-label="Loading">
      <div class="ring"></div>
      <div class="dot"></div>
    </div>
  </div>
</body>
</html>