Learn TypeScript 3 by Building Web Applications

Hello (Type/Java)Script!

So, TypeScript is a superset of JavaScript, right? Let's see what that actually means by following these steps:

1. Create a new file called hello-world.ts:

The .ts file extension stands for TypeScript.

You can do it from within VS Code:

As you can see, VS Code directly recognizes TypeScript files:

2. Now add the following code to your newly created file:

var hello = "Hello world";function say(something) { console.log(something);}say(hello);

Now let's do a silly thing: let's ask Node (our JavaScript interpreter) to execute ...