Dr. Axel Rauschmayer • 2/19/2025

The bottom type <code>never</code> in TypeScript

Read Original

This article provides an in-depth look at TypeScript's `never` type, explaining its nature as a bottom type (the empty set) and its behavior in type operations. It covers practical use cases such as filtering union types with conditional types and performing compile-time exhaustiveness checks in switch statements, complete with code examples.

0 comments
#TypeScript #type system #union types
The bottom type <code>never</code> in TypeScript

Comments

No comments yet

Be the first to share your thoughts!

Browser Extension

Get instant access to AllDevBlogs from your browser

Top of the Week

1
React vs Browser APIs (Mental Model)
Jivbcoop • 3 votes
2
React, useEffect, and Stale Closures: How to Avoid Them with Dependencies and useRef
Jivbcoop • 2 votes
3
Building Type-Safe Compound Components
TkDodo Dominik Dorfmeister • 2 votes
4
Using Browser Apis In React Practical Guide
Jivbcoop • 1 votes
5
Better react-hook-form Smart Form Components
Maarten Hus • 1 votes