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

# Merging values
Like interfaces, an `enum` can be defined in more than one place. You can start defining the `enum` and later define it again. In the end, all values merge into a single `enum`. There is one constraint with multiple definitions of a single `enum`: the first value of every `enum` must have an explicit value. If an explicit value is defined twice, only the last value will be associated with the `enum` when using the reverse value to find an `enum`. Listing the same value twice is not a feature of multiple definitions; a single enumeration definition can have several entries with the same values as well.

In this lesson, you will see two advanced features: merging and adding functions to enum.

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

Merging and Adding Functionality to Enum

Merging values #