2022-04-27
1272
#typescript
Matteo Di Pirro
103746
Apr 27, 2022 â‹… 4 min read

Optional chaining and nullish coalescing in TypeScript

Matteo Di Pirro I am an enthusiastic young software engineer who specialized in the theory of programming languages and type safety. I enjoy learning and experimenting with new technologies and languages, looking for effective ways to employ them.

Recent posts:

Don’t Let AI Erase The Next Generation Of Dev Leaders

Don’t let AI erase the next generation of dev leaders

As AI tools take over more routine coding work, some companies are cutting early-career dev roles — a short-sighted move that could quietly erode the next generation of tech leaders if we aren’t careful.

Jack Herrington
Aug 26, 2025 â‹… 6 min read

Qwen3-Coder: Is this Agentic CLI smarter than senior devs?

Discover Qwen3-Coder, Alibaba’s 480B parameter agentic coding CLI, with real-world tests, use cases, and performance insights.

Chizaram Ken
Aug 26, 2025 â‹… 4 min read

daisyUI 5 is here: What’s new and what to expect

Explore daisyUI 5’s new features, performance upgrades, and theming engine built for Tailwind CSS 4 developers.

Ikeh Akinyemi
Aug 25, 2025 â‹… 8 min read
Why Kimi K2 is a frontend game-changer

Agentic AI for 5x less: Why Kimi K2 is a frontend game-changer

Kimi K2 doesn’t just tell you what to write or how to solve a problem; it writes the code, executes the tasks, and gets stuff done.

Chizaram Ken
Aug 22, 2025 â‹… 8 min read
View all posts

2 Replies to "Optional chaining and nullish coalescing in TypeScript"

  1. I think this article could potentially “misteach” people to create types like `nullableUndefinedString` when you could mostly use `argOrProp?: string | null`.

    Also, there’s no need to use strict types checks for null and undefined when you could check for both like `value == null`.

  2. Regarding nullableUndefinedString, you’re right and, as a matter of fact, it was just an easy way to define a single type used throughout the entire article without repeating it meaning every time.

    strictNullChecks, on the other hand, is recommended by the documentation itself. Hence, even if there are other ways in the language to achieve the same result, to me, the pros of that flag outweigh the cons.

Leave a Reply