TypeScript is a typed superset of JavaScript that compiles to plain JavaScript.

typescript

TypeScripts purpose, the reason it exists, is to add a solid type system on top of ECMAScript 6+. JavaScript is a dynamically typed language. TypeScript applies a fundamental change to the language and applies static typing to the code in our applications.

This course will dive into the type system that TypeScript provides. You will gain a deeper understanding of what types can do for your applications. 

This is a basic introduction to static typing with Typescript.
In this lesson we will learn about simple types in TypeScript.

Introduction to Static Typing

This lesson explains how the Typescript compiler uses inference to guess what types we’re using, so we don’t have to annotate all the things.

Using Type Inference in TypeScript

Sometimes we want our function arguments to be able to accept more than 1 type; e.g. a string or an array. This lesson will show us how to assign more than 1 type to a variable with Typescript union types and type aliases.

Union Types and Type Aliases in TypeScript

In JavaScript, many libraries use string arguments to change behavior. In this lesson we learn how Typescript catches string related errors at compile time by assigning a string literal as a type.


Distinguishing between types of Strings in TypeScript

It’s easy to pass the wrong value to a function. Typescript interfaces are great because they catch errors at compile time or in an IDE. In this lesson we’ll learn how to describe a type shape with Typescript interfaces.

Using Interfaces to Describe Types in TypeScript

Typescript classes make traditional object oriented programming easier to read and write. In this lesson we learn about class syntax, what the constructor is and some interesting variable features.


Creating a Class in TypeScript 

Typescript classes make inheritance much easier to write and understand. In this lesson we look into how to set up inheritance with Typescript classes, extends and super.


Sharing Class Behavior with Inheritance in TypeScript 

Sometimes the compiler needs help figuring out a type. In this lesson we learn how to help out the compiler with Typescript type assertion.

Using Assertion to Convert Types in TypeScript

It can be painful to write the same function repeatedly with different types. Typescript generics allow us to write 1 function and maintain whatever type(s) our function is given. This lesson covers syntax and a basic use case for Typescript generics.

The Basics of Generics in TypeScript

Typescript generics are great for writing code that accepts any type. How do we write code that doesn’t accept any type, but instead accepts a range of types? In this lesson we learn how to use generic classes, interfaces and constraints to be more specific with our Typescript generics.

Use Types Effectively in TypeScript

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