Understand the fetch API

At the end of the video you mention that fetch isn't available for the browser yet, but it is available for React Native.

If I plan on writing a web app, (that also serves as a Hybrid Mobile App), that relies heavily on API calls, should I just stick to $.get(), or can I start using fetch?

Ironically Fetch went live a few days ago in the latest version of Chrome. But if you want ANY sort of older support, definitely go with $.get for now.

Github has their fetch.js shim (which I used in the JSBin here).