动态时钟

动态时钟展示

CSS
body {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  height: 100vh;
}

.clock {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
}

.clock .divider {
  font-size: 66px;
  line-height: 102px;
  font-style: normal;
}

.clock .flip {
  position: relative;
  width: 60px;
  height: 100px;
  margin: 2px;
  font-size: 66px;
  line-height: 100px;
  text-align: center;
  background: white;
  border: 1px solid black;
  border-radius: 10px;
  -webkit-box-shadow: 0 0 6px rgba(0, 0, 0, 0.5);
          box-shadow: 0 0 6px rgba(0, 0, 0, 0.5);
  -webkit-box-reflect: below 1px linear-gradient(transparent, rgba(0, 0, 0, 0.4));
}

.clock .flip .digital::before, .clock .flip .digital::after {
  position: absolute;
  content: attr(data-number);
  left: 0;
  right: 0;
  color: white;
  background: black;
  overflow: hidden;
  -webkit-perspective: 160px;
          perspective: 160px;
}

.clock .flip .digital::before {
  top: 0;
  bottom: 50%;
  border-bottom: 1px solid #666;
  border-radius: 10px 10px 0 0;
}

.clock .flip .digital::after {
  top: 50%;
  bottom: 0;
  line-height: 0;
  border-radius: 0 0 10px 10px;
}

.clock .flip .back::before,
.clock .flip .front::after {
  z-index: 1;
}

.clock .flip .back::after {
  z-index: 2;
}

.clock .flip .front::before {
  z-index: 3;
}

.clock .flip .back::after {
  -webkit-transform-origin: center top;
          transform-origin: center top;
  -webkit-transform: rotateX(0.5turn);
          transform: rotateX(0.5turn);
}

.clock .flip.running .front::before {
  -webkit-transform-origin: center bottom;
          transform-origin: center bottom;
  -webkit-animation: frontFlipDown 0.6s ease-in-out;
          animation: frontFlipDown 0.6s ease-in-out;
  -webkit-box-shadow: 0 -2px 6px rgba(255, 255, 255, 0.3);
          box-shadow: 0 -2px 6px rgba(255, 255, 255, 0.3);
  -webkit-backface-visibility: hidden;
          backface-visibility: hidden;
}

.clock .flip.running .back::after {
  -webkit-animation: backFlipDown 0.6s ease-in-out;
          animation: backFlipDown 0.6s ease-in-out;
}

@-webkit-keyframes frontFlipDown {
  to {
    -webkit-transform: rotateX(0.5turn);
            transform: rotateX(0.5turn);
  }
}

@keyframes frontFlipDown {
  to {
    -webkit-transform: rotateX(0.5turn);
            transform: rotateX(0.5turn);
  }
}

@-webkit-keyframes backFlipDown {
  to {
    -webkit-transform: rotateX(0);
            transform: rotateX(0);
  }
}

@keyframes backFlipDown {
  to {
    -webkit-transform: rotateX(0);
            transform: rotateX(0);
  }
}
/*# sourceMappingURL=time.css.map */

HTML
 

      

        

        

      
      

        

        

      
      :
      

        

        

      
      

        

        

      
      :
      

        

        

      
      

        

        

      
    

JAVASCRIPT
 'use strict'
      var Flipper = /** @class */ (function() {
        function Flipper(node, currentTime, nextTime) {
          this.isFlipping = false
          this.duration = 600
          this.flipNode = node
          this.frontNode = node.querySelector('.front')
          this.backNode = node.querySelector('.back')
          this.setFrontTime(currentTime)
          this.setBackTime(nextTime)
        }
        Flipper.prototype.setFrontTime = function(time) {
          this.frontNode.dataset.number = time
        }
        Flipper.prototype.setBackTime = function(time) {
          this.backNode.dataset.number = time
        }
        Flipper.prototype.flipDown = function(currentTime, nextTime) {
          var _this = this
          if (this.isFlipping) {
            return false
          }
          this.isFlipping = true
          this.setFrontTime(currentTime)
          this.setBackTime(nextTime)
          this.flipNode.classList.add('running')
          setTimeout(function() {
            _this.flipNode.classList.remove('running')
            _this.isFlipping = false
            _this.setFrontTime(nextTime)
          }, this.duration)
        }
        return Flipper
      })()
      var getTimeFromDate = function(date) {
        return date
          .toTimeString()
          .slice(0, 8)
          .split(':')
          .join('')
      }
      var flips = document.querySelectorAll('.flip')
      var now = new Date()
      var nowTimeStr = getTimeFromDate(new Date(now.getTime() - 1000))
      var nextTimeStr = getTimeFromDate(now)
      var flippers = Array.from(flips).map(function(flip, i) {
        return new Flipper(flip, nowTimeStr[i], nextTimeStr[i])
      })
      setInterval(function() {
        var now = new Date()
        var nowTimeStr = getTimeFromDate(new Date(now.getTime() - 1000))
        var nextTimeStr = getTimeFromDate(now)
        for (var i = 0; i < flippers.length; i++) {
          if (nowTimeStr[i] === nextTimeStr[i]) {
            continue
          }
          flippers[i].flipDown(nowTimeStr[i], nextTimeStr[i])
        }
      }, 1000)

预览图

效果预览图.gif