js convert ip to int, int to ip

ip.js

const ip2int = ip => ip.split('.').reverse().map((v, i) => +v << (8 * i)).reduce((s, a) => s | a);

const int2ip = it => it.toString(2).padStart(32, 0).match(/.{8}/g).map(v => parseInt(v, 2)).join('.');


// test 
console.log(ip2int(`127.0.0.1`)); // 2130706433

console.log(int2ip(2130706433));  // 127.0.0.1