JavaScript does the action on the client side, and Node on the server. With Node, you can write complete applications. Node can work with external libraries, call commands from JavaScript code, and act as a web server.

What is the advantage of Node?

It's easier to scale with Node. When thousands of users connect to the server at the same time, Node works asynchronously, that is, it sets priorities and allocates resources more intelligently. Java, for example, allocates a separate thread for each connection.

Where did Node come from?

Node was born in 2009 thanks to Ryan Dahl. Prior to that, servers had a one-thread-per-connection approach, and Dahl came up with an event-driven system. That is, it reacts to action or inaction and allocates a resource for this. The main goal of Node is to build scalable network servers.

What is Node.js used for?

If you are wondering what node js can be used for, we will give a short answer here https://fireart.studio/blog/why-node-js-is-still-a-good-choice-for-your-startup-in-2020/ , Node.js technology was created as an alternative to the client / server model, in which the server only responds to the client request and closes the connection immediately after every answer. Node.js establishes a two-way connection and interactive communication between the server and the user's browser, which achieves low latency and high throughput.