JavaScript in the Node

  • In the last lecture, we executed this piece of JavaScript code inside of a browser.
// This is my first JavaScript code !
console.log('Hello World');

  • In this lecture, I'm going to show you how to run the same code in Node.

  • So I'm assuming you have installed Node on your machine, if not head over to nodejs.org and download the latest version of Node.

  • Now if you're on Windows, open up command prompt, if you're on Mac, open up terminal, and head over to the folder or directory that you have created earlier.

  • In the terminal, run Node, and pass the name of our JavaScript file, that is index.js.

  • We get the same message on the console.

  • We can see that node is a program that includes google's v8 JavaScript engine.

  • We can give it a piece of JavaScript code, and it will execute that code for us just like how we can execute some JavaScript code in a browser.

Node is a run time environment for executing JavaScript code.

  • Now let me show you a tip. Here in vs code we have an integrated terminal, so you don't have to explicitly open up a separate terminal window.

  • So go to VS code, and open up the integrated terminal by pressing the shorcut keyboard key : Cltrl + back quote (which is for Windows)

  • So we don't have to explicitly navigate to this folder. And here we can run Node

    index.js as well.