Implementation code for converting IP addresses and integers in JS

It is mainly used to determine whether an IP segment entered by the user is legal in JS, such as: 192.168.1.11-192.168.1.134

Implementation code one:

function ipToNumber(ip) { 
  var num = 0; 
  if(ip == "") { 
    return num; 
  }   
  var aNum = (".");  
  if( != 4) { 
    return num; 
  }   
  num += parseInt(aNum[0]) &lt;&lt; 24; 
  num += parseInt(aNum[1]) &lt;&lt; 16; 
  num += parseInt(aNum[2]) &lt;&lt; 8; 
  num += parseInt(aNum[3]) &lt;&lt; 0; 
  num = num &gt;&gt;&gt; 0;//This is very critical, otherwise there may be negative numbers.  return num;  
}   
  
function numberToIp(number) {   
  var ip = ""; 
  if(number &lt;= 0) { 
    return ip; 
  } 
  var ip3 = (number &lt;&lt; 0 ) &gt;&gt;&gt; 24; 
  var ip2 = (number &lt;&lt; 8 ) &gt;&gt;&gt; 24; 
  var ip1 = (number &lt;&lt; 16) &gt;&gt;&gt; 24; 
  var ip0 = (number &lt;&lt; 24) &gt;&gt;&gt; 24 
   
  ip += ip3 + "." + ip2 + "." + ip1 + "." + ip0; 
   
  return ip;   
}

Implementation code two:

//Convert IP to a wholefunction _ip2int(ip) 
{
  var num = 0;
  ip = (".");
  num = Number(ip[0]) * 256 * 256 * 256 + Number(ip[1]) * 256 * 256 + Number(ip[2]) * 256 + Number(ip[3]);
  num = num &gt;&gt;&gt; 0;
  return num;
}
//Integer parsed to IP addressfunction _int2iP(num) 
{
  var str;
  var tt = new Array();
  tt[0] = (num &gt;&gt;&gt; 24) &gt;&gt;&gt; 0;
  tt[1] = ((num &lt;&lt; 8) &gt;&gt;&gt; 24) &gt;&gt;&gt; 0;
  tt[2] = (num &lt;&lt; 16) &gt;&gt;&gt; 24;
  tt[3] = (num &lt;&lt; 24) &gt;&gt;&gt; 24;
  str = String(tt[0]) + "." + String(tt[1]) + "." + String(tt[2]) + "." + String(tt[3]);
  return str;
}

The above is the complete code, and friends who need it can refer to it.