Gain insights into TypeScript's core concepts, from basics to advanced type checking and iterators. Learn about static typing and JS library support through practical, hands-on experience.

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If you’re looking to move beyond vanilla JavaScript and take your skills to the next level, then you’ve come to the right place. TypeScript is an in-demand language that sits on top of JavaScript. This means you can do everything you can in JavaScript with TypeScript, but also enjoy countless other perks including support for JS libraries, NPM, static typing, and much more.

In this course, you’ll start from the beginning and work your way up to more advanced concepts like type checking, iterators, and manipulating objects and arrays. You'll get a chance to get your hands dirty with plenty of real practice along the way.

For JavaScript developers, TypeScript is a must-know language, not only for today but also for years to come. Don't miss out.

Learn TypeScript: The Complete Course for Beginners

# Creating a copy
Three dots (`...`) define the spread operator. It can be used on an array to take every element of the array, create a copy of each element, and return the copied variables. If you spread an array of three elements, you will receive a copy of the ten elements positioned one after the other. In the following example, **line 1** is the original array. The following line, **line 2**, does the copy with the spread operator.

**Line 4** demonstrates that they are copies and do not point to the same value.


 

In this lesson, you will learn how to use the spread operator with arrays.

Introduction

The Basics of Variables

Comment

Enum

Generic Type

Functions

Mapped Type

Objects

Index Signature

Variables Advanced

Exception

Alias

Type Checking

Iterators

Manipulating Objects and Array

Sharing Code

Conclusion

The Spread Operator and Arrays

Creating a copy