Frontend>Blogs/Talks

A complete guide to TypeScript’s never type

CommunityNews

CommunityNews

A complete guide to TypeScript’s never type

TypeScript’s never type is very under-discussed, because it’s not nearly as ubiquitous or inescapable as other types. A TypeScript beginner can probably ignore never type as it only appears when dealing with advanced types, such as conditional types, or reading their cryptic type error messages.

The never type does have quite a few good use cases in TypeScript. However, it also has its own pitfalls you need to be careful of.

In this blog post, I will cover:

  • The meaning of never type and why we need it.
  • Practical applications and pitfalls of never.
  • a lot of puns :rofl:

Read in full here:

This thread was posted by one of our members via one of our news source trackers.

View thread on forum
/typescript#guide#type
2 884 0

Where Next?

View thread on forum
typescript
guide
type
Home Frontend>Blogs/Talks
/typescript#guide#type
2 889 0
Last post

Popular Frontend topics Top

AstonJ
Frontend>Blogs/Talks

Write Safer JavaScript Applications With TypeScript!
Haven’t watched it yet but posting it and bookmarking the thread :nerd_face: TypeScript continues to soar in popularity…
youtube.com
/typescript/js
1 969 0
New
First poster: PaigePalmer
Frontend>Blogs/Talks

Top 5 things to know about Progressive Web Apps
Progressive Web Apps (PWAs) are starting to get some attention. For instance, Amazon is using it for game streaming service on iOS. PWAs ...
techrepublic.com
#apps#video#web
4 969 2
New
First poster: bot
Frontend>Blogs/Talks

State of JavaScript 2020
As crappy as 2020 was, JavaScript as a whole still managed to somehow move forward. As the language itself keeps improving thanks to new ...
2020.stateofjs.com
/js
0 825 0
New
First poster: bot
Frontend>Blogs/Talks

A Model for Reasoning About JavaScript Promises (2017)
In JavaScript programs, asynchrony arises in situations such as web-based user-interfaces, communicating with servers through HTTP reques...
franktip.org
/js
0 898 0
New
First poster: bot
Frontend>Blogs/Talks

WebAssembly Search Tools for Static Sites
The challenge of searching static websites is effectively a solved problem with brilliant, yet widely unadopted, solutions. These projec...
healeycodes.com
/wasm
0 790 0
New
First poster: bot
Frontend>Blogs/Talks

HTML over the wire (2020)
You can write fast, modern, responsive web applications by generating your HTML on the server, and delivering that (with a little help) d...
m.signalvnoise.com
/ruby/rails/html
0 1042 0
New
First poster: bot
Frontend>Blogs/Talks

Building React and Vue Support for Tailwind UI
Hey! We’re getting really close to releasing React + Vue support for Tailwind UI, so I thought it would be interesting to share some of t...
blog.tailwindcss.com
/react/tailwind
0 1010 0
New
First poster: bot
Frontend>Blogs/Talks

ES2021 Features
ES2021 features list as approved by the Ecma General Assembly Logical Assignment Operators (&&= | Numeric Separators (1_000) ...
h3manth.com
/js
0 936 0
New
First poster: bot
Frontend>Blogs/Talks

JS is weird - a fun and tricky JavaScript quiz
JavaScript is a great programming language, but thanks to the fact that its initial release was built in only ten days back in 1995, coup...
jsisweird.com
/js
2 803 0
New
First poster: bot
Frontend>Blogs/Talks

A complete guide to TypeScript’s never type
TypeScript’s never type is very under-discussed, because it’s not nearly as ubiquitous or inescapable as other types. A TypeScript beginn...
zhenghao.io
/typescript#guide#type
2 884 0
New

Other popular topics Top

DevotionGeo
Backend>Chat

What is the reason behind Rust’s web framework, Rocket, not performing as well as expected in the Techempower benchmarks?
I know that these benchmarks might not be the exact picture of real-world scenario, but still I expect a Rust web framework performing a ...
#web-frameworks/rust
36 6421 11
New
Exadra37
General Dev>Hardware

What monitor(s) do you have for programming?
Please tell us what is your preferred monitor setup for programming(not gaming) and why you have chosen it. Does your monitor have eye p...
#monitors#coding#programming#development
227 8528 88
New
dasdom
General Dev>Dev Chat

Standing Desks
No chair. I have a standing desk. This post was split into a dedicated thread from our thread about chairs :slight_smile:
#workspace#opinions
177 8527 77
New
AstonJ
General Dev>Dev Chat

What are the 'coolest' languages and tech right now?
Inspired by this post from @Carter, which languages, frameworks or other tech or tools do you think is killing it right now? :upside_down...
#community/elixir/erlang/rust/typescript/phoenix#otp/svelte/wasm#adoption#cool-tech/agda
160 3700 49
New
dimitarvp
macOS>Chat

My thoughts on macOS vs Linux
Small essay with thoughts on macOS vs. Linux: I know @Exadra37 is just waiting around the corner to scream at me “I TOLD YOU SO!!!” but I...
#macos#linux
166 7579 69
New
AstonJ
Backend>Chat

Rails console using 100% CPU in dev (fix)
If you are experiencing Rails console using 100% CPU on your dev machine, then updating your development and test gems might fix the issu...
/ruby/rails
3 3557 3
New
AstonJ
Frontend>Chat

Online Hand to eye coordination test
Was just curious to see if any were around, found this one: I got 51/100: Not sure if it was meant to buy I am sure at times the b...
#online-tools
4 3601 1
New
First poster: bot
General Dev>In The News

Zig now has built-in HTTP server and client in std
zig/http.zig at 7cf2cbb33ef34c1d211135f56d30fe23b6cacd42 · ziglang/zig. General-purpose programming language and toolchain for maintaini...
github.com
/zig#http
0 2606 0
New
sir.laksmana_wenk
Game Dev>Questions

I want to learn how make a game, but where should I start?
I’m able to do the “artistic” part of game-development; character designing/modeling, music, environment modeling, etc. However, I don’t...
#game-dev
14 1055 8
New
AstonJ
Backend>Questions

Psql: error: connection to server on socket "/tmp/.s.PGSQL.5432" failed: No such file or directory
If you’re getting errors like this: psql: error: connection to server on socket “/tmp/.s.PGSQL.5432” failed: No such file or directory ...
#macos/rails/postgresql
1 1825 1
New
Back to top

Latest in TypeScript

TypeScript Portal ❯

Frontend>Blogs/Talks

Frontend Blogs/Talks ❯

Latest on Devtalk

Devtalk ❯

We ❤️ helpful members!

We reward our most helpful members via our MOTM scheme - by giving away a whopping 25 books per year!

Member of the Month

Devtalk Sponsors

Pragmatic Bookshelf

Practical resources that improve the lives of professional developers.

Erlang Solutions

We build trusted fault-tolerant systems that scale to billions of users.

Honeybadger

Real-time error tracking, performance insights, and observability for devs.

Manning Publications

Develop your skills with books, videos, and courses.

AppSignal

Catch errors, track performance, monitor hosts and more.

WyeWorks

Enabling companies to succeed by building software people love.

Pragmatic Studio

Courses that'll move you from confusion to "Aha, now I get it!"

View all our sponsors ❯

Categories:

Sub Categories:

Popular Portals

Devtalk Sponsors

Pragmatic Bookshelf

Practical resources that improve the lives of professional developers.

Erlang Solutions

We build trusted fault-tolerant systems that scale to billions of users.

Honeybadger

Real-time error tracking, performance insights, and observability for devs.

Manning Publications

Develop your skills with books, videos, and courses.

AppSignal

Catch errors, track performance, monitor hosts and more.

WyeWorks

Enabling companies to succeed by building software people love.

Pragmatic Studio

Courses that'll move you from confusion to "Aha, now I get it!"

View all our sponsors ❯

We're in Beta

About us Mission Statement See our Roadmap