เทมเพลต CSS Loading Spinner: วงกลมและแถบหมุนแบบเคลื่อนไหว

<style>
  /* วงกลมหมุน */
  .spinner-circle {
    border: 4px solid #f3f3f3;
    border-top: 4px solid #3498db;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 2s linear infinite;
  }

  /* แถบหมุน */
  .spinner-bar {
    width: 50px;
    height: 5px;
    background-color: #3498db;
    animation: bar 1s infinite alternate;
  }

  @keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
  }

  @keyframes bar {
    0% { width: 0; }
    50% { width: 50px; }
    100% { width: 0; }
  }
</style>
  

<div class="spinner-circle"></div>

<div class="spinner-bar"></div>

<style>
  /* วงกลมหมุน */
  .spinner-circle {
    border: 4px solid #f3f3f3;
    border-top: 4px solid #3498db;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 2s linear infinite;
  }

  /* แถบหมุน */
  .spinner-bar {
    width: 50px;
    height: 5px;
    background-color: #3498db;
    animation: bar 1s infinite alternate;
  }

  @keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
  }

  @keyframes bar {
    0% { width: 0; }
    50% { width: 50px; }
    100% { width: 0; }
  }
</style>