webtorrentaddr-to-ip-port 
Convert an "address:port" string to an array [address:string, port:number]
Uses a cache to prevent excessive array allocations and GC.
Works in node and the browser. This module is used by WebTorrent!
install
npm install addr-to-ip-portusage
import addrToIPPort from 'addr-to-ip-port'
addrToIPPort('1.2.3.4:8000') //=> ['1.2.3.4', 8000]
addrToIPPort('1.2.3.4:8000') //=> ['1.2.3.4', 8000] (returns the cached object)license
MIT. Copyright (c) Feross Aboukhadijeh and WebTorrent, LLC.