Javascript 判断字符串是否是IP地址

Javascript 判断字符串是否是IP地址。

文章源自陈学虎-https://chenxuehu.com/article/2018/10/7303.html

function isIp(ipstr)
{
    try
    {
        if(ipstr=="" || ipstr==undefined)return false;
        if(!/^(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])(\.(\d{1,2}|1\d\d|2[0-4]\d|25[0-5])){2}\.(\d{1,2}|1\d\d|2[0-4]\d|25[0-4])$/.test(ipstr)) 
        {
            return false;
        }
        var ls=ipstr.split('.');
        if(ls==null || ls.length!=4 || ls[3]=="0" || parseInt(ls[3])===0)
        {
            return false;
        }
        return true;
    }catch(ee){}
    return false;
}

 文章源自陈学虎-https://chenxuehu.com/article/2018/10/7303.html 文章源自陈学虎-https://chenxuehu.com/article/2018/10/7303.html