??实现效果

在这里插入图片描述
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??源码

<!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>Digital Clock</title>
  <link rel="stylesheet" href="./style.css">
</head>
<body>
  <div id="time">
    <div class="circle" style="--clr:#ff2972;">
      <div class="dots hr_dot"></div>
      <svg>
        <circle cx="70" cy="70" r="70"></circle>
        <circle cx="70" cy="70" r="70" id="hh"></circle>
      </svg>
      <div id="hours" class="common">00</div>
    </div>

    <div class="circle" style="--clr:#fee800;">
      <div class="dots min_dot"></div>
      <svg>
        <circle cx="70" cy="70" r="70"></circle>
        <circle cx="70" cy="70" r="70" id="mm"></circle>
      </svg>
      <div id="minutes" class="common">00</div>
    </div>

    <div class="circle" style="--clr:#04fc43;">
      <div class="dots sec_dot"></div>
      <svg>
        <circle cx="70" cy="70" r="70"></circle>
        <circle cx="70" cy="70" r="70" id="ss"></circle>
      </svg>
      <div id="seconds" class="common">00</div>
    </div>

    <div class="ap">
      <div id="ampm">AM</div>
    </div>
  </div>

  <script>
    setInterval(() => {
      let hours = document.getElementById('hours')
      let minutes = document.getElementById('minutes')
      let seconds = document.getElementById('seconds')
      let ampm = document.getElementById('ampm')

      let hh = document.getElementById('hh')
      let mm = document.getElementById('mm')
      let ss = document.getElementById('ss')

      let hr_dot = document.querySelector('.hr_dot')
      let min_dot = document.querySelector('.min_dot')
      let sec_dot = document.querySelector('.sec_dot')

      let h = new Date().getHours()
      let m = new Date().getMinutes()
      let s = new Date().getSeconds()
      let am = h > 12 ? 'PM' : 'AM'

      // convert 24hr clock to 12hr clock
      if(h > 12) {
        h = h - 12
      }

      // add zero before single digit number
      h = (h < 10) ? '0' + h : h
      m = (m < 10) ? '0' + m : m
      s = (s < 10) ? '0' + s : s

      // hours.innerHTML = h
      // minutes.innerHTML = m
      // seconds.innerHTML = s

      hours.innerHTML = h + "<br><span>Hours</span></br>"
      minutes.innerHTML = m + "<br><span>Minutes</span></br>"
      seconds.innerHTML = s + "<br><span>Seconds</span></br>"
      ampm.innerHTML = am

      hh.style.strokeDashoffset = 440 - (440 * h) / 12
      // 12 hrs clock

      mm.style.strokeDashoffset = 440 - (440 * m) / 60
      // 60minutes
      ss.style.strokeDashoffset = 440 - (440 * s) / 60
      // 60seconds

      hr_dot.style.transform = `rotate(${h * 30}deg)`
      // 360 / 12 = 30
      min_dot.style.transform =  `rotate(${m * 6}deg)`
      // 360 / 60 = 6
      sec_dot.style.transform =   `rotate(${s * 6}deg)`
      // 360 / 60 = 6
    })
    
  </script>
</body>
</html>

@import url('https://fonts.googleapis.com/css?family=Poppins:200,300,400,500,600,700,800,900&display=swap');

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Poppins', sans-serif;
}

body {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background: #2f363e;
}

#time {
  display: flex;
  gap: 40px;
  color: #fff;
}

#time .circle {
  position: relative;
  width: 150px;
  height: 150px;
  display: flex;
  justify-content: center;
  align-items: center;
}

/* 修饰svg start */
#time .circle svg {
  position: relative;
  width: 150px;
  height: 150px;
  transform: rotate(270deg);
}
#time .circle svg circle {
  width: 100%;
  height: 100%;
  fill: transparent;
  stroke: #191919;
  stroke-width: 4;
  transform: translate(5px, 5px);
}

#time .circle svg circle:nth-child(2) {
  stroke: var(--clr);
  stroke-dasharray: 440;
}
/* svg end */


#time  div{
  position: absolute;
  text-align: center;
  font-weight: 500;
  font-size: 1.5em;
}

#time .common {
  top: 40px;
}

#time div span {
  position: absolute;
  transform: translateX(-50%) translateY(-10px);
  font-size: 0.35em;
  font-weight: 300;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

#time .ap {
  position: relative;
  font: 1em;
  transform: translateX(-20px);
}

/* svg圆点 */
.dots {
  position: absolute;
  width: 100%;
  height: 100%;
  z-index: 10;
  display: flex;
  justify-content: center;
}

.dots::before {
  content: '';
  position: absolute;
  top: -3px;
  width: 15px;
  height: 15px;
  background: var(--clr);
  border-radius: 50%;
  box-shadow: 0 0 20px var(--clr),
              0 0 60px var(--clr);
}