Node Js Development

Why Node.js?

Here’s a formal definition as given on the official Node.js website:

Node.js® is a JavaScript runtime built on Chrome’s V8 JavaScript engine.

Node.js uses an event-driven, non-blocking I/O model that makes it lightweight and efficient.

Node.js’ package ecosystem, npm, is the largest ecosystem of open source libraries in the world.
We already discussed the first line of this definition: “Node.js® is a JavaScript runtime built on Chrome’s V8 JavaScript engine.” Now let’s understand the other two lines so we can find out why Node.js is so popular.

I/O refers to input/output. It can be anything ranging from reading/writing local files to making an HTTP request to an API.

I/O takes time and hence blocks other functions.

Consider a scenario where we request a backend database for the details of user1 and user2 and then print them on the screen/console. The response to this request takes time, but both of the user data requests can be carried out independently and at the same time.

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