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TypeScript

TypeScript is a statically typed superset of JavaScript that compiles to plain JavaScript. It adds optional static typing, classes, interfaces, and other features to JavaScript, making it a strongly typed language that can catch type-related issues early on.

With almost 40 million weekly downloads from NPM, TypeScript is one of the most popular packages for frontend developers and one of the most widely adopted flavors of JavaScript.

Why Should I Learn TypeScript?

Still, the question remains: why should I care about learning TypeScript? What's in it for me? Here are five reasons to help you decide whether you should invest your time in learning TypeScript:

Show Me How TypeScript Works

Let's take a look at a simple example to see how TypeScript works. In the following code, we have a clamp function that takes in a number, min, and max values, and returns a number:

Copied to clipboard! 
// JavaScript implementation
const clamp = (num, min, max) => Math.min(Math.max(num, min), max);

// TypeScript implementation
const clamp = (
    num: number,
    min: number,
    max: number
): number => Math.min(Math.max(num, min), max);
clamp.ts
Typing a function in TypeScript

To turn this function from JavaScript to TypeScript, we simply added types to the parameters and the return value using the number type. Types can be assigned using a colon, followed by the type, such as number, string, or boolean.

Where Should I Start?

If you are new to TypeScript, you should start with the basics. First, you need to familiarize yourself with the syntax and the different types that TypeScript offers.

How to get started with TypeScript
How to Get Started With TypeScriptMaking your JavaScript strongly typedJavaScript is weakly typed by its nature. This means data types are always inferred from the variable declarations. However, TypeScript is here to help us.

Working with function types, interfaces, enums, and type conversions should also be in your toolbelt. The official documentation of TypeScript can also guide you with full of examples.

Once you are familiar with the basics and you are comfortable building statically typed applications, you can start exploring more advanced concepts, such as generics or working with classes.

If you would like to learn more about TypeScript, you can find all of our latest tutorials below. Use the filters in the sidebar if you want to narrow down the results. Additionally, you can filter for TypeScript-related tutorials on our search page. I wish you good luck with learning TypeScript!

Keep on coding! 👨‍💻

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