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Top 10 TypeScript Utility Types You Should Know 🛠️

Komal Raut
JavaScript in Plain English
6 min readJan 23, 2025

Read the story for free here and explore more insights into Typescript Utility Types.

You might find TypeScript overkill at first whenever you start employing TypeScript, but with the further diving in, one will be able to acknowledge that TypeScript is really best for writing safer and maintainable code. One such feature is the utlity type in TypeScript.

They are built-in types so as to enable a whole other kind of easy type-manipulations-in other words, easier manipulation of code without the need to rewrite that same logic. In this blog, we will talk about 10 of the most common utility types of TypeScript that one must know and learn how one should use them as well as those cases when it is better to avoid them altogether.

Let’s explore!🚀

1. Partial<T>

What it does:
The
Partial<T> utility type makes all properties of a type optional. For instance, if you have an interface that defines a complete object but sometimes you only need to update part of that object, Partial<T> is a great way to make all its properties optional.

How it works:

interface User {
id: number;
name: string;
email: string;
}

const updateUser = (user: Partial<User>) => {…

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Published in JavaScript in Plain English

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Written by Komal Raut

I write about JavaScript, MERN, Next.js, TypeScript, and Firebase—sharing coding tips, best practices, and insights to simplify web development.

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Great article

What it does:
The Partial<T> utility type makes all properties of a type optional. For instance, if you have an interface that defines a complete object but sometimes you only need to ...

You’ve crafted an article that’s as engaging as it is informative.