lovecoding
/
class


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <script>
      // 字面量 1 2 3 4 56 true false
      // 变量
      var a = 3;
      function time() {
        // 倒计时
        // 逻辑：结束时间 开始时间
        // 时间无法直接运算 转换成时间戳(毫秒)
        var start = new Date().getTime();
        var end = new Date("2024-04-20 19:00").getTime();
        // console.log(start);
        // console.log(end);
        var diffTime = (end - start) / 1000;
        var day = Math.floor(diffTime / 60 / 60 / 24);
        var hour = Math.floor((diffTime / 60 / 60 ) % 24);
        var minutes = Math.floor((diffTime / 60) % 60);
        var seconds = Math.floor(diffTime % 60);
        console.log(day + '天'  + hour + '小时' + minutes + '分' + seconds + '秒')
      }
      setInterval(function(){
        time();
      },1000)
    </script>
  </body>
</html>