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@@ -0,0 +1,60 @@
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+<!DOCTYPE html>
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+<html lang="en">
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+<head>
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+ <meta charset="UTF-8">
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+ <meta http-equiv="X-UA-Compatible" content="IE=edge">
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+ <meta name="viewport" content="width=device-width, initial-scale=1.0">
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+ <title>Document</title>
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+</head>
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+<body>
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+ <script>
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+ /*
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+ cookie 本地存储 大小 4K 默认的有效期 当前对话窗口
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+ 可以通过expires 设置过期时间
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+ */
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+ document.cookie = "name='zs'"
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+ var date = new Date()
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+ date.setDate(date.getDate() + 1)
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+ console.log(date)
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+ console.log(date.toUTCString())
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+ document.cookie = "password= '123';expires=" + date.toUTCString()
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+
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+ function setCookie (key,value,expires){
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+ var date = new Date()
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+ date.setDate(date.getDate() + expires)
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+ document.cookie = key + '=' + value + ';expires=' + date.toUTCString()
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+ }
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+ setCookie()
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+
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+ function getCookie (key) {
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+ var cookie = document.cookie
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+ console.log(cookie)
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+ /*
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+ 创建一个数组 存放分开这个字符串
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+ .split 把字符串 拆分成数组
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+ ["password='123'", ' undefined=undefined', " name='zs'"]
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+ */
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+ var arr = cookie.split(';')
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+ console.log(arr)
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+ for(var i=0;i<arr.length;i++){
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+ var tmp = arr[i].split('=')
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+ console.log(tmp)
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+ /* trim() 方法 用于删除字符串的头尾空白符 */
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+ if(tmp[0].trim() == key){
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+ return tmp[1]
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+ }
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+ }
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+ }
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+ console.log(getCookie('undefined'))
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+
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+
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+
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+ function delCookie(key){
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+ var date = new Date()
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+ date.setDate(date.getDate() - 1 )
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+ document.cookie = key + '=null;expires=' + date.toUTCString()
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+ }
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+ delCookie('password')
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+ </script>
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+</body>
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+</html>
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zsydgithub