With Node JS rapidly becoming a top choice for developers worldwide, you, too, may want to adopt it or perhaps you’re just curious.
In this blog post, we will explore the basics of Node JS and how it works, some of its key features as well as Node JS advantages and disadvantages. We will also take a look at some of the disadvantages of using Node JS so you can be prepared. Whether you are a beginner or an experienced developer, this post will provide you with a comprehensive understanding of Node JS and its capabilities.
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What is Node JS?
Where is Node JS used?
Node JS can be applied in many areas such as:
Here are some popular names you will recognize who use Node JS:
How does Node JS work?
Here are 5 simple steps for you to get an overview of the process.
Now the big questions.
Node JS only has a single thread. So how can Node JS handle multiple requests with just one thread? And on time? Because it gets many requests every second.
If it takes requests in a queue and fulfilling each request takes 3 seconds on average, then fulfilling the request would be like this:
This time is too long, so how does Node JS work to handle requests in thousands and millions? For giants like Netflix and Uber?
It has 2 special features:
What is Non-Blocking I/O in Node JS?
Non-blocking, I/O in Node JS refers to the ability of the system to perform other operations while it is waiting for input/output (I/O) operations to complete. In contrast, traditional blocking I/O systems can only perform one operation at a time and must wait for the current operation to complete before moving on to the next one.
In Node JS, non-blocking I/O is achieved by using an event-driven, callback-based model. When an I/O operation is initiated, the system assigns a callback function to be executed once the operation completes. In the meantime, the system is free to continue processing other events and requests.
This non-blocking, I/O model makes Node JS lightweight and efficient, as it can handle a large number of concurrent requests without requiring a lot of system resources. It also makes it well-suited for real-time web applications, such as chat or gaming apps, which require fast response times.
What is Asynchronous in Node JS?
Asynchronous programming in Node JS refers to the ability of the system to perform multiple operations at the same time, without waiting for one operation to complete before starting another.
This is achieved through the use of callback functions. When an asynchronous operation is initiated, such as reading from a file or making an HTTP request, the system assigns a callback function to be executed once the operation completes. In the meantime, the system is free to continue processing other events and requests.
This allows Node JS to handle a large number of concurrent operations without blocking the execution of other code. Asynchronous programming in Node JS also allows for non-blocking I/O operations, making it lightweight and efficient when compared to traditional synchronous systems.
It makes more efficient use of system resources and enables the application to handle more concurrent requests without slowing down.
Let’s now take a look at Node JS pros and cons.