lovecoding
/
W260426


			
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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>
        function setCookie(name,value,expire){
            var date = new Date();
            var nowDate = date.getDate();
            date.setDate(nowDate+expire);
            var dateStr = date.toUTCString();
            document.cookie = name + "="+value+";expires="+dateStr;


        }
        // 设置cookie
        // 语法：setCookie(name,value,expire); 第一个key值 第二个value 第三个过期时间(日期天数)
        // setCookie("username","张三",1)
        // setCookie("age","18",1)


        function getCookie(name){
            var cookies = document.cookie;
            cookies = cookies.split(";")
            for(var i=0;i<cookies.length;i++){
                var resArr = cookies[i].split("=");
                if(resArr[0].trim() == name){
                    return resArr[1];
                }
            }
            // console.log(cookies);
            
        }

        // 获取cookie
        // 语法：getCookie(name); 第一个key值
        var keyValue = getCookie("username");
        console.log(keyValue);

        // 删除cookie
        // 语法：deleteCookie(name); 第一个key值
        // 删除cookie其实就是把过期时间改为已经过去的时间
        function deleteCookie(name){
            setCookie(name,"",-1);
        }
        deleteCookie("age");
        
    </script>
</body>
</html>