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

The mapped type `Omit` is the inverse of `Pick`. While `Pick` is used to select a member of a type, `Omit` takes everything except the member selected. Before going any further, here is the exact same example from `Pick`, except using the `Omit` mapping instead.

In the following code, **lines 1** to **10** define a type with an interface called  `Animal`. However, in **lines 17** to **21**, we have a function that requires a subset of all the fields of an animal. We could `Pick` the field needed, however in the scenario where only a few fields need to be removed, `Omit` is preferred. The reason is that fewer fields need to be specified: only the one not desired. **Line 13** has a function that removes three fields from `Animal`.

This lesson explains the omit mapped type.

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

Omit