js操作cookie

js本地化操作，设置cookie、获取cookie，删除cookie的例子：

参考网站：w3c js操作cookie

代码：

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<button id="btn1" onclick="setCookies()">设置cookies</button>
<button id="btn2" onclick="getCookies()">读取cookies</button>
<button id="btn3" onclick="clearCookies()">清除cookies</button>
</body>
<script type="text/javascript">
function setCookies(){
    setCookie('name', 'zhangsan');
    setCookie('password', '123456', 2);
    setCookie('age', '12');
}

function getCookies(){
    var name = getCookie('name');
    var password = getCookie('password');
    var age = getCookie('age');
    console.log("name:"+name+" password:"+password+" age:"+age);
}

function clearCookies(){
    deleteCookie('name');
    deleteCookie('age');
    deleteCookie('password');
}

/**
 * 设置cookie 键值对形式
 * name 存储的key
 * value 对应的值
 * expiredays 过期时间 天数  如果为null的话不设置过期时间
 * 不设置这个值的话，cookie默认在关闭浏览器时失效
 */
function setCookie(name, value, expiredays){
    var exdate=new Date();
    if(expiredays==null || typeof(expiredays)=='undefined'){
        document.cookie = name + "="+escape(value);
    }else{
        exdate.setDate(exdate.getDate()+expiredays);
        document.cookie = name + "="+escape(value)+";expires="+exdate.toGMTString();
    }
}

/**
 * 读取cookie
 */
 function getCookie(name){
    if(document.cookie.length>0){
        var start = document.cookie.indexOf(name + "=");
        if(start != -1){
            start = start + name.length + 1;
            end = document.cookie.indexOf(";",start);
            if(end == -1){
                end = document.cookie.length;
            }
            return unescape(document.cookie.substring(start, end));
        }
    }
    return null;
}

/**
 * 删除cookie
 */
 function deleteCookie(name){
    var exp = new Date();
    exp.setTime(exp.getTime() - 1000); //当前时间减去一秒,相当于立即过期(可以增减)
    var val = getCookie(name);
    if(val!=null){
        document.cookie = name + "="+val+";expires="+exp.toGMTString();
    }
}
</script>
</html>

password设置了过期时间，看设置过期时间与不设置过期时间的区别：

posted on 2017-04-18 03:15 有点懒惰的大青年阅读(268) 评论(0) 编辑收藏举报