js根据ip和掩码位数获取ip段

DuRuo:
const Netmask = require('netmask').Netmask
const block = new Netmask('172.16.0.0/23')
console.log(block.first + '-' + block.last)
// block.forEach((ip, long, index) => {
//   console.log('Next IP is', ip)
// })

DuRuo:
npm install netmask