index.html

<!doctype html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <link rel="icon" href="/favicon.ico" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Vite App</title>
    <meta name="description" content="Vite Starter Template By Kirk Lin" />
  </head>
  <body>
    <div id="app">
      <style>
        .app-loading {
          display: flex;
          width: 100%;
          height: 100%;
          justify-content: center;
          align-items: center;
          flex-direction: column;
          background-color: #f4f7f9;
        }

        .app-loading .app-loading-wrap {
          position: absolute;
          top: 50%;
          left: 50%;
          display: flex;
          transform: translate3d(-50%, -50%, 0);
          justify-content: center;
          align-items: center;
          flex-direction: column;
        }

        .loader {
          width: 48px;
          height: 48px;
          margin: auto;
          position: relative;
        }

        .loader:before {
          content: "";
          width: 48px;
          height: 5px;
          background: #f0808050;
          position: absolute;
          top: 60px;
          left: 0;
          border-radius: 50%;
          animation: shadow324 0.5s linear infinite;
        }

        .loader:after {
          content: "";
          width: 100%;
          height: 100%;
          background: #f08080;
          position: absolute;
          top: 0;
          left: 0;
          border-radius: 4px;
          animation: jump7456 0.5s linear infinite;
        }

        @keyframes jump7456 {
          15% {
            border-bottom-right-radius: 3px;
          }

          25% {
            transform: translateY(9px) rotate(22.5deg);
          }

          50% {
            transform: translateY(18px) scale(1, 0.9) rotate(45deg);
            border-bottom-right-radius: 40px;
          }

          75% {
            transform: translateY(9px) rotate(67.5deg);
          }

          100% {
            transform: translateY(0) rotate(90deg);
          }
        }

        @keyframes shadow324 {
          0%,
          100% {
            transform: scale(1, 1);
          }

          50% {
            transform: scale(1.2, 1);
          }
        }
      </style>
      <div class="app-loading">
        <div class="app-loading-wrap">
          <div class="loader"></div>
        </div>
      </div>
    </div>

    <script type="module" src="/src/main.ts"></script>
  </body>
</html>