lovecoding
/
web0715


			
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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>
        // 向本地存储中设置一个新的cookie
        function setCookie(key,val,time){
            var timer = new Date();
            timer.setDate(timer.getDate()+time);
            console.log(timer.toUTCString());
            document.cookie = `${key}=${val};Expires=${timer.toUTCString()}`;
        }

        // 根据key值获取本地cookie
        function getCookie(key){
            var cookieVal = document.cookie;
            cookieVal = cookieVal.split(";")
            console.log(cookieVal);
            var valStr = "";
            for(var i=0;i<cookieVal.length;i++){
                // console.log(cookieVal[i].split("="))
                // 将每一个键值对根据“=”进行分割 分别值key值（第一个值） vlaue值（第二个值）
                var keyStr = cookieVal[i].split("=")[0];
                valStr = cookieVal[i].split("=")[1]
                // 去除掉字符串左右两边的空格
                keyStr = keyStr.trim();
                if(keyStr == key){
                    return valStr;
                }
                
            }
            return valStr
        }

        // 删除cookie
        function delCookie(key){
            var timer = new Date();
            // 把当前时间设置为过期时间
            timer.setDate(timer.getDate()-2);
            document.cookie = `${key}=null;Expires=${timer.toUTCString()}`;
        }
        // setCookie("username","小张",3);
        // setCookie("password","123",3);
        // setCookie("school","黑大",3);

        // console.log(getCookie("password"));
        delCookie("username");
        delCookie("password");
        

    </script>
</body>
</html>