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

# Iteration and the TypeScript generator
TypeScript generators are an advanced and very modern concept. They use the `function*` syntax which is the standard `function` keyword followed by an asterisk. The star syntax indicates that a function returns a generator object. A function that returns a generator object can return multiple times. This function allows the use of the `yield` keyword, which returns a value without returning the function. It allows for potential infinite iteration, while still being able to consume the value outside the function. The function returns a generator object which has a `.next()` function. The next function returns a value of type `IteratorResult`. The function returns when the iteration is over with a `done` property from `IteratorResult`. The `done` property is of type Boolean and is used to tell a `while` or `for` loop to stop.  

This lesson shows how to iterate with asynchronous loops.

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

Iterating and the Asynchronous Loop

Iteration and the TypeScript generator