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Some of the most useful npm modules today are: express - Express. Underscore initiated the game, but got overthrown by one of its two counterparts, mainly due to better performance and modular implementation. Keeps your Node.
The list goes on. Examples of Where Node. From IRC back in the day , through many proprietary and open protocols running on non-standard ports, to the ability to implement everything today in Node.
The chat application is really the sweet-spot example for Node.
In the simplest example, we have a single chatroom on our website where people come and can exchange messages in one-to-many actually all fashion. For instance, say we have three people on the website all connected to our message board.
On the server-side, we have a simple Express. Server-side component of the websocket connection receives the message and forwards it to all other connected clients using the broadcast method.
All clients receive the new message as a push message via a websockets client-side component running within the web page.
They then pick up the message content and update the web page in-place by appending the new message to the board. This is the simplest example. For a more robust solution , you might use a simple cache based on the Redis store.
But regardless of the improvements that you make, Node. JSON stored data allow Node. With Node. In sum, you can avoid the need for multiple conversions by using a uniform data serialization format across the client, server, and database.
As depicted above, Node. But because database access is a blocking operation in this case , we run into trouble. Data gets queued through some kind of caching or message queuing infrastructure—like RabbitMQ or ZeroMQ—and digested by a separate database batch-write process, or computation intensive processing backend services, written in a better performing platform for such tasks.
In short: with Node, you can push the database writes off to the side and deal with them later, proceeding as if they succeeded. This observation can be utilized in Node.
This could be done for real-time audio or video encoding , and proxying between different data sources see next section. An example: consider a server-side application communicating with third-party resources, pulling in data from different sources, or storing assets like images and videos to third-party cloud services.
Although dedicated proxy servers do exist, using Node instead might be helpful if your proxying infrastructure is non-existent or if you need a solution for local development. By this, I mean that you could build a client-side app with a Node. Switching to a real-time web-based solution would allow brokers to easily switch workstations or working places. Soon, we might start seeing them on the beach in Florida..
You could be gathering real-time stats from your user, or even moving it to the next level by introducing targeted interactions with your visitors by opening a communication channel when they reach a specific point in your funnel.
Imagine how you could improve your business if you knew what your visitors were doing in real-time—if you could visualize their interactions. With the real-time, two-way sockets of Node.
Because that's the catch: you already are an experienced developer, you don't want to learn a new technique by just hacking around and mis-using it; you want to be sure that you are approaching it from the right angle.
There is, of course, excellent documentation out there.
It's more like "from novice to advanced novice".
If I don't fail, then this will be the kind of document I wish I had when starting with Node. But this is just the context.