gistfile1.js

// Chaining API for URIBuilder

var uri = new URLBuilder()
  .parse('bad_url_format', loggerErrorHandler)
  .addQueryParam('param','value')
  .setPort('443')
  .toString();

// How to handle the bad url parse error ?
// Don't want to throw exception
// Can't return null

function loggerErrorHandler(err, url_object){
  console.log(err.message);
  
  return url_object;
}