nightmare-evaluate-async

Adds evaluateAsync method to Nightmare. You can use evaluateAsync to evaluate asynchronous code in Nightmare's browser context.

Supports Node.js style callbacks and Promises plus you can use generators for control-flow.

Install

$ npm install nightmare-evaluate-async

Usage

var Nightmare = require('nightmare');
var vo = require('vo');
 
// Adds evaluateAsync method
require('nightmare-evaluate-async')(Nightmare)
 
vo(run)(function(err, result) {
  if (err) throw err;
});
 
function *run() {
  var nightmare = Nightmare();
 
  // Return promises
  var res = yield nightmare.evaluateAsync(function() {
    return Promise.resolve('promises')
  });
  console.log(res);
 
  // Generators for control-flow
  var res = yield nightmare.evaluateAsync(function *() {
    yield Promise.resolve('generators+promises=<3')
  });
  console.log(res);
 
  // Callbacks are okay too!
  var res = yield nightmare.evaluateAsync(function (cb) {
    cb(null, "callback")
  });
  console.log(res);
 
  yield nightmare.end();
}