I unknowingly came across it when I began working on a web application prototype at work. While I was familiar with MongoDB (our team used it in a previous prototype), I was really itching to learn Node.js… so I took the plunge and began poring over tutorials. Many of the examples repeatedly mentioned Express as a handy Node.js web application framework, so it was an easy decision to include it as part of my toolset. My biggest challenge, however, was organizing the client-side code. I have used Backbone.js before, but I wasn’t fully satisfied with it. A colleague of mine then mentioned an emerging client-side MVC framework from Google called AngularJS and encouraged me to check it out. The rest, I guess you can say, is history.
To help others get started with MEAN, I have created a Vagrant environment that can be found here.
Also, if you are interested in learning more, here’s a video that provides a nice introduction: