使用Javascript的会话中的自动增量功能不起作用 [英] Auto Increment in Session using Javascript is not working

问题描述

我需要什么

• 我需要像用户刷新页面时一样，我需要增加会话变量的计数.

js代码

             <script type="text/javascript">
            var count=0;
            var counter=sessionStorage.setItem("count", 0);
            var counters= sessionStorage.getItem("count");
            console.log(counters);
            var page_count =counters;
            if (page_count == 4)
            {
            dataLayer.push({'event':'mobilePromo-android'});
            }
        $(document).ready(function()
        {
            var page_count =counters;
            var height= $(window).height();
            if (page_count == 4 )
            {

                $.ajax({
                    type: "GET",
                    url: "http://domain.com/mobilepopuptracker?from=android", 

                });

                $('body').html('<div class="row flush aligncenter popbx" style="height:'+height+'px"><img src="http://im.gifbt.com/images/logo-300p");              



            }
            else
            {

            }

               counters=counters+1;
        });
            function redirect()
            {

                  var a=$(location).attr('href');
                   window.location.href=a;
            }

        </script>

问题

• 计数值不是自动刷新的，因为刷新了浏览器.
• console.log(counters)//0.
• 任何建议都是最欢迎的.

价值解决方案代码仍然无效

After value solution code still not working

            var counter = null;
            if(sessionStorage.getItem("count") == null)
            {
            counter=sessionStorage.setItem("count", 0);
            counters = 0;
            }
            else
            {
            counters= parseInt(sessionStorage.getItem("count"));

            }

            var page_count =counters;
            if (page_count == 4)
            {
            dataLayer.push({'event':'mobilePromo-android'});
            }
            var page_count =counters;
            console.log(page_count);
            var height= $(window).height();
            if (page_count == 4 )
            {

                $.ajax({
                    type: "GET",
                    url: "http://times.com/mobilepopuptracker?from=android", 

                });

                $('body').html('<div class="row flush aligncenter popbx" style="height:'+height+'px">');                



            }
            else
            {

            }
              counters++;
             console.log(counters);
            function redirect()
            {

                  var a=$(location).attr('href');
                   window.location.href=a;
            }

• 问题输出一直到1，这是没有增加.什么地方不对."

输出

• 如果将计数器设置为0，则它​​将自动递增为1，依此类推.
• console.log(计数器)//01，它应该是自动递增的.

参考链接

  https://developer.mozilla.org/en-US/docs/Web/Guide/API/DOM/Storage

推荐答案

您需要先检查会话值是否可用

you need to check first for session value is available

var counter = null;
if(sessionStorage.getItem("count") == null){
  counter=sessionStorage.setItem("count", 1);
  counters = 1;
}else{
  counters= parseInt(sessionStorage.getItem("count")); 
  counters++;
   counter=sessionStorage.setItem("count", counters);
}

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