lovecoding
/
VIP24


			
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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>
  <!-- cookie sessionstorage  localstorage -->
  <!-- cookie  大小 4k -->

  <script>
    document.cookie = "name = 'zs'"

    var date = new Date()
    date.setDate(date.getDate() + 1)
    console.log(date)
    console.log(date.toUTCString())

    document.cookie = "password='123';expires=" + date.toUTCString

    function setCookie(key, value, expires) {
      var date = new Date()
      date.setDate(date.getDate() + expires)
      document.cookie = key + '=' + value + ';expires=' + date.toUTCString()
    }
    setCookie('addres', 'harbin', 2)


    function getCookie(key) {
      var cookie = document.cookie
      // console.log(cookie)

      /* 
        创建一个arr  存放分开的数组
        .split()方法 把字符串拆分成数组
        ["name='zs'", " password='123'", ' addres=harbin']
      */
      var arr = cookie.split(';')
      // console.log(arr)
      for(var i=0;i<arr.length;i++){
        // console.log(arr[i])
        var tmp = arr[i].split('=')
        // console.log(tmp)
        /* trim() 用于删除字符串当中的头尾空白符 */
        if(tmp[0].trim() == key){
          return tmp[1]
        }
      }
    }
    console.log(getCookie('password'))


    function delCookie(key){
      var date = new Date()
      date.setDate(date.getDate() -1 )
      document.cookie = key + '=null;expires=' + date.toUTCString()
    }
    delCookie('name')
  </script>
</body>

</html>