lovecoding
/
VIP28


			
				
					
						
						
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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>Document</title>
</head>

<body>
  <button id="btn">按钮</button>
  <button id="stop">按钮B</button>
  <button id="num">按钮C</button>
  <script>
    var btn = document.getElementById('btn')
    var stop = document.getElementById('stop')
    var num = document.getElementById('num')
    /* 间隔多少毫秒去执行 */
    btn.onclick = function () {
      var b = 1
      var a = setInterval(function () {
        if (b < 10) {
          b++
          console.log(b)
        } else {
          clearInterval(a)
        }
      }, 1000)
    }

    stop.onclick = function () {
      var c = setTimeout(function () {
        console.log(111)
      }, 1000)
    }
    /*  
    setInterval   不断的去执行   通过clearInterval 清除定时器
    setTimeout   只执行一次 */

    num.onclick = function () {
      //获取一个随机数
      //Math.random()  0~1
      //Math.floor  向下取整  跟四舍五入没关系   
      var h = setInterval(function () {
        var nn = Math.random() * 10
        var mm = Math.floor(nn)
        console.log(mm)
      }, 1000)
    }

  </script>
</body>

</html>