obs-time/index.html at main · whatwg6/obs-time · GitHub

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<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>obs - time</title>
    <style>
      #time {
        display: inline;
      }
    </style>
  </head>
  <body>
    <div id="time">时间加载中...</div>
    <script
      src="https://cdnjs.cloudflare.com/ajax/libs/date-fns/1.30.1/date_fns.min.js"
      integrity="sha512-F+u8eWHrfY8Xw9BLzZ8rG/0wIvs0y+JyRJrXjp3VjtFPylAEEGwKbua5Ip/oiVhaTDaDs4eU2Xtsxjs/9ag2bQ=="
      crossorigin="anonymous"
      referrerpolicy="no-referrer"
    ></script>
    <script>
      const run = () => {
        const t = document.getElementById("time");

        function* updateTime() {
          while (true) {
            yield (t.innerText = window.dateFns.format(
              new Date(),
              "YYYY-MM-DD HH:mm:ss"
            ));
          }
        }

        const g = updateTime();

        let start = performance.now();

        return function next() {
          while (performance.now() - start > 1000) {
            start = performance.now();
            g.next();
          }
          setTimeout(next);
        };
      };

      run()();
    </script>
  </body>
</html>