Question

我尝试使用提示让某人输入值，将该值转换为Cookie，然后使用链接将该人重定向到第二页，其中将显示其Cookie值。我遇到的问题是，无论我输入什么，有问题的cookie都会继续返回null。任何帮助，将不胜感激！

这是一个Javascript代码。

首页（提示页面）

＆＃13;

<!DOCTYPE html>
<html>
    <head>
        <title>Event Handlers</title>
<script>
         function createCookie(name, value, days, path, domain, secure) {
                if (days) {
                        var date = newDate();
                        date.setTime( date.getTime() + (days*24*60*60*1000));
                        var expires = date.toGMTString ();//code
                }
                else var expires = "";
                cookieString = name + "=" + escape(value);
                if (expires) cookieString += ";expires=" + expires;
                if (path) cookieString += "; path=" + escape (path);
                if (domain) cookieString += "; domain=" + escape (domain);
                if (secure) cookieString += "; secure";
                document.cookie = cookieString
                                
                }

function getCookie(name) {
                var nameEquals = name + "=";
                var crumbs = document.cookie.split(';');
                for (var i = 0; i < crumbs.length; i++) {
                                var crumb = crumbs[i];
                                if (crumb.indexOf(nameEquals) == 0) {
                                                return unescape(crumb.substring(nameEquals.length, crumb.length));
                                                //code
                                }
                }
                return null;
}

function deleteCookie(name) {
                createCookie(name,"",-1);
                //code
}
</script>

    <script>
    window.onload = function() {
        var cookievalue = prompt("Cookie Value:");
        createCookie("myCookieData", cookievalue);
    }
    </script>
    </head>
    <body>
<a href="/cookietest2">Go to Cookie Test Page 2</a>
        
    </body>
</html>

＆＃13;

第二页（显示Cookie页面）

＆＃13;

<!DOCTYPE html>
<html>
    <title>Cookie Testing</title>
     <head>
    <script>
function createCookie(name, value, days, path, domain, secure) {
                if (days) {
                        var date = newDate();
                        date.setTime( date.getTime() + (days*24*60*60*1000));
                        var expires = date.toGMTString ();//code
                }
                else var expires = "";
                cookieString = name + "=" + escape(value);
                if (expires) cookieString += ";expires=" + expires;
                if (path) cookieString += "; path=" + escape (path);
                if (domain) cookieString += "; domain=" + escape (domain);
                if (secure) cookieString += "; secure";
                document.cookie = cookieString
                                
                }

function getCookie(name) {
                var nameEquals = name + "=";
                var crumbs = document.cookie.split(';');
                for (var i = 0; i < crumbs.length; i++) {
                                var crumb = crumbs[i];
                                if (crumb.indexOf(nameEquals) == 0) {
                                                return unescape(crumb.substring(nameEquals.length, crumb.length));
                                                //code
                                }
                }
                return null;
}

function deleteCookie(name) {
                createCookie(name,"",-1);
                //code
}
    </script>

    
    <script>
    window.onload = function () {
        document.getElementById("output").innerHTML = "Your cookie value: " + getCookie("myCookieData");
    }
</script>

   </head>
    <body>
        <a href="/hour">Back to Cookie Test Page 1</a><br />
        <div id="output"></div>
    </body>
</html>

＆＃13;

此外，如果有人可以提供有关如何向第二页添加按钮以从第一页删除cookie的提示，那也将非常感谢！但就目前而言，我只是想弄明白为什么我的cookie一直被归还为null。提前谢谢！

Answer 1

某些浏览器的本地文件中不允许使用Cookie。因此，如果您正在使用本地文件 - 请尝试将这些文件上传到服务器并再次尝试。适合我。

要添加Cookie删除按钮，您可以使用：

<input type="button" onClick="deleteCookie('myCookieData')" />

Cookie值始终返回null

1 个答案: