CommunityNews

CommunityNews

User-defined type guards in TypeScript

Decided to write this blog post because I couldn’t find any documentation or online examples like the one I’m sharing here. Every example I’ve seen the user-defined type guard is used to replace the whole type definition and not specific properties…

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

First Post!

bot

bot

Corresponding tweet for this thread:

Share link for this tweet.

Popular Frontend topics Top

First poster: bot
How I built a telnet chat server in 2021 with WebAssembly. I love the aesthetics of terminals and I’m not the only one, there is a whole...
New
First poster: bot
Last year I created Pomodone, a small time tracking application based on the Pomodoro technique of working in 25 minute intervals. It’s a...
New
First poster: bot
clickbait isn’t it? But this was Brock’s immediate reaction when we saw (and I recommend you read this first): Full Third-Party Cookie ...
New
First poster: bot
This guide is intended to cover everything you need to know about creating, manipulating and comparing strings in JavaScript. Extra tips...
New
First poster: bot
Humio software engineers Thomas Anagrius and Jeroen Engels sat down to talk about why they got involved with Elm for web-based front-end ...
New
First poster: bot
Introduction WebAssembly is a standard of the World Wide Web consortium, which latest official release is WebAssembly Core Specification,...
New
XSukhpreet
Mine is Firebase because it is easy to learn and fast .
New
First poster: bot
For every day of advent I am building a new UI Component. The theme? You guessed it ― Christmas. :christmas_tree:
New
AstonJ
I can’t remember who was asking about CSS tuts now… but these just showed up on my YouTube feed and look pretty good/up to date :023:
New
First poster: bot
TypeScript’s never type is very under-discussed, because it’s not nearly as ubiquitous or inescapable as other types. A TypeScript beginn...
New

Other popular topics Top

AstonJ
A thread that every forum needs! Simply post a link to a track on YouTube (or SoundCloud or Vimeo amongst others!) on a separate line an...
New
AstonJ
What chair do you have while working… and why? Is there a ‘best’ type of chair or working position for developers?
New
AstonJ
Curious to know which languages and frameworks you’re all thinking about learning next :upside_down_face: Perhaps if there’s enough peop...
New
AstonJ
Do the test and post your score :nerd_face: :keyboard: If possible, please add info such as the keyboard you’re using, the layout (Qw...
New
Margaret
Hello content creators! Happy new year. What tech topics do you think will be the focus of 2021? My vote for one topic is ethics in tech...
New
wmnnd
Here’s the story how one of the world’s first production deployments of LiveView came to be - and how trying to improve it almost caused ...
New
rustkas
Intensively researching Erlang books and additional resources on it, I have found that the topic of using Regular Expressions is either c...
New
New
New
PragmaticBookshelf
Author Spotlight: Peter Ullrich @PJUllrich Data is at the core of every business, but it is useless if nobody can access and analyze ...
New