Hands-On Full Stack Web Development with Angular 6 and Laravel 5

Writing JavaScript code with static types

The first thing that you'll notice when working with TypeScript are its static types, in addition to all of the JavaScript types, indicated on the following table:

Primitives	Objects
String	Function
Number	Array
Null	Prototypes
Undefined
Boolean
Symbol

 

This means that you can declare the types of variables; it's pretty simple to assign a type to a variable. Let's look at some examples, using JavaScript types only:

function Myband () {  let band: string;  let active: boolean;  let numberOfAlbuns: number;}

With TypeScript, we have a few more types, as we'll see in the following sections.