判断字符串是否为IP的正则
function is_ip(ip){ let re = /^([0-9]|[1-9]d|1dd|2[0-4]d|25[0-5]).([0-9]|[1-9]d|1dd|2[0-4]d|25[0-5]).([0-9]|[1-9]d|1dd|2[0-4]d|25[0-5]).([0-9]|[1-9]d|1dd|2[0-4]d|25[0-5])$/; if(!re.test(ip)){ return false; } return true; }
function is_ip(ip){ let re = /^([0-9]|[1-9]d|1dd|2[0-4]d|25[0-5]).([0-9]|[1-9]d|1dd|2[0-4]d|25[0-5]).([0-9]|[1-9]d|1dd|2[0-4]d|25[0-5]).([0-9]|[1-9]d|1dd|2[0-4]d|25[0-5])$/; if(!re.test(ip)){ return false; } return true; }