what is nodejs

Node.js is a runtime system for creating server-side applications. It can easily build network or other event-driven application servers; Node.js is also a streamlined, highly customizable server engine. , which is processed in a loop and is ready to accept and respond to requests.

The operating environment of this article: Windows7 system, Dell G3 computer, nodejs10.16.2.

Node.js is a runtime system for creating server-side applications, which makes it easy to build network or other event-driven application servers.

As JavaScript becomes more and more popular and new tools and new features are developed rapidly, Node.js is also becoming more and more popular. Many programmers use it to create APIs and use it on the Internet. Building a new interoperability matrix on

Definition

Node.js is a runtime system for creating server-side applications. It is a popular means for JavaScript coders to build real-time web APIs. But be clear that Node.js is not a JavaScript framework. Node.js is a streamlined, highly customizable server engine that processes in a loop and is ready to accept and respond to requests. Any of these requests can initiate requests to other parts of the system.

In short, Node.js is a runtime system for creating server-side applications, which makes it easy to build network or other event-driven application servers.

Use of Node.js

(1) Collect data

Using Node.js can improve the efficiency of collecting massive data, because when we collect Data is often blocked due to the large amount of data, but with Node.js we will not be blocked when storing data

(2) Chat room

We can use Node.js to do it A simple chat room function, although it does not implement many functions, can realize the basic function of chatting between friends

(3) Games in the browser

With the continuous development of technology And innovation, we don't need to open the application when playing the game, because with Node.js our browser game is possible.

(4) Streaming

Usually when we process uploaded video and audio files, we usually do it after uploading, but after using Node.js, we can process it when uploading, saving a lot of money Time to access media faster

Example: Create a hello.js file under the node.js installation folder

function hello() {
   console.log('Hello World!');
}
hello();

##Summary: Node .js can easily implement real-time web applications in JavaScript, and I believe there will be better and better development in the near future.

【Recommended course: node.js tutorial】

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