lift.js exits with "ReferenceError: Promise is not defined" after update.

[Senci]

Hi Guys, I've seen that there has been changes lately so I decided to update. Unfortunately node is now exiting with following error message:

> node spawn.js                                                                                                                                                    ~/Documents/phridge «22:16»

/Users/sli/node_modules/phridge/lib/lift.js:14
        return new Promise(function (resolve, reject) {
                   ^
ReferenceError: Promise is not defined
    at /Users/sli/node_modules/phridge/lib/lift.js:14:20
    at Object.spawn (/Users/sli/node_modules/phridge/lib/spawn.js:45:12)
    at Object.<anonymous> (/Users/sli/Documents/phridge/spawn.js:3:9)
    at Module._compile (module.js:456:26)
    at Object.Module._extensions..js (module.js:474:10)
    at Module.load (module.js:356:32)
    at Function.Module._load (module.js:312:12)
    at Function.Module.runMain (module.js:497:10)
    at startup (node.js:119:16)
    at node.js:929:3

After it didn't work, I figured a fresh install may fix the issue. Unfortunately it didn't. I've un- and reinstalled node through brew, un- and reinstalled all npm packages. So I should have a fresh install, but unfortunately the Error is still present.

content of "spawn.js":

var phridge = require('phridge'); // https://www.npmjs.com/package/phridge
phridge.spawn().then(function(phantom) {
    phantom.run(function(resolve) {
        this.page = webpage.create();
    });
});

Cheers!

[jhnns]

Hi, thanks for the feedback and your PR.

This is somewhat intentional. I've waited for this change for the next breaking change because I expected that this would break someone's code. However, Promise should be globally available since node@0.12. If you're running phridge with an older node version, you just need to add a Promise polyfill to global and everything should be working fine.

[Senci]

Oh okay, I see. You are right, although brew build node 0.12, it was unable to successfully link and therefore I was still on an old version for some reason. After some permission changes and a new install I linked node 0.12 and now it works like a charm.