I wouldn't say the advice on how to pick an employer is the best one.

I have less than a year of experience in any sort of development. I spent most of that time at a non-profit that gave me a lot of freedom to learn. Small but good team that did government contracting, gave a lot of space to learn, and had people focused on staying on top of the web world.

I since switched jobs and am my company's AngularJS expert, solving any frontend problems that stumps my co-workers as well as architecting the frontend structure for new apps.

I think the important take away is to find an employer that gives you the space & opportunity to learn. Then it is up to you to make the most of it.