Multiple Nightmare Example

index.js

var Nightmare = require('nightmare');
var urls = ['http://www.nytimes.com/', 'http://www.gnu.org/'];

function test() {
  var nightmare1 = new Nightmare();
  var nightmare2 = new Nightmare();

  nightmare1
    .goto(urls[0])
    .evaluate(function () {
      return document.documentElement.innerHTML;
    }, function (res) {
      console.log('evaluate: ' + urls[0]);
    })
    .run(function (err, nightmare) {
      console.log('run: ' + urls[0]);
    });
  nightmare2
    .goto(urls[1])
    .evaluate(function () {
      return document.documentElement.innerHTML;
    }, function (res) {
      console.log('evaluate: ' + urls[1]);
    })
    .run(function (err, nightmare) {
      console.log('run: ' + urls[1]);
    });
}

test();

output.txt

evaluate: http://www.gnu.org/
run: http://www.gnu.org/