It is an exciting time to be involved in Internet technology. Everywhere, there are amaz‐ ing new ideas (or amazing old ideas revitalized). The spirit of innovation and excitement is greater now than it has been in many years
The Express website describes Express as “a minimal and flexible node.js web applica‐ tion framework, providing a robust set of features for building single and multipage and hybrid web applications.” What does that really mean, though? Let’s break that description down:
This is one of the most appealing aspects of Express. Many times, framework de‐ velopers forget that usually “less is more.” The Express philosophy is to provide the minimal layer between your brain and the server. That doesn’t mean that it’s not robust, or that it doesn’t have enough useful features. It means that it gets in your way less, allowing you full expression of your ideas, while at the same time providing something useful.
Another key aspect of the Express philosophy is that Express is extensible. Express provides you a very minimal framework, and you can add in different parts of Express functionality as needed, replacing whatever doesn’t meet your needs. This is a breath of fresh air. So many frameworks give you everything, leaving you with a bloated, mysterious, and complex project before you’ve even written a single line of code. Very often, the first task is to waste time carving off unneeded functionality, or replacing the functionality that doesn’t meet requirements. Express takes the opposite approach, allowing you to add what you need when you need it.
The core philosophy behind Node is that of event-driven programming.What that means for you, the programmer, is that you have to understand what events are available to you and how to respond to them. Many people are introduced to event-driven pro‐ gramming by implementing a user interface: the user clicks on something, and you handle the “click event.” It’s a good metaphor, because it’s understood that the program‐ mer has no control over when, or if, the user is going to click something, so event-driven programming is really quite intuitive. It can be a little harder to make the conceptual leap to responding to events on the server, but the principle is the same.
Non-blocking I/O means it can do what you need a server to do very well. Take requests and never block itself from receiving more requests while fulfilling it's queue.
Being able to use one single programming language to write both client and serverside code menas is much easier.
Node.JS has quickly risen as one of the most popular and motivated development communicates around. it's still considered a very viable alternative to Python, Ruby, C# and Java Readmore