title: Timer countdown Angular 2
body: <p>I'm trying to make a countdown timer for my Ionic2 app, the thing is that I was using this method from now <a href="https://stackoverflow.com/a/44489685/4329781"><code>countdown timer</code></a> but now I have to create the countdown like 30:00 min, what's the better way to do it? Time could change, and if I want to fire something when the countdown it's done I only have to be comparing the <code>time</code> if it's 0, right?</p>