notesnook/packages/core/utils/hostname.js

export function extractHostname(url) {
  var hostname;
  //find & remove protocol (http, ftp, etc.) and get hostname

  if (url.indexOf("//") > -1) {
    hostname = url.split("/")[2];
  } else {
    hostname = url.split("/")[0];
  }

  //find & remove port number
  // hostname = hostname.split(":")[0];
  //find & remove "?"
  hostname = hostname.split("?")[0];

  return hostname;
}