2022-02-01
2640
#typescript
Sneh Pandya
90351
Feb 1, 2022 â‹… 9 min read

Methods for TypeScript runtime type checking

Sneh Pandya Exploring the horizon with a knack for product management. Co-host of the NinjaTalks podcast and community organizer at Google Developers Group. Explorer, adventurer, traveler.

Recent posts:

A guide to the CSS cursor property

A guide to the CSS cursor property

Learn about built-in CSS cursors, creating custom cursors with CSS, using multiple cursors, and adding animations with CSS and JavaScript.

Samson Omojola
Mar 3, 2025 â‹… 8 min read
Build A Custom React Native Turbo Module For Android

Build a custom React Native Turbo Module for Android

Build a React Native Turbo Module for Android to access device info like model, IP, uptime, and battery status using native mobile APIs.

Emmanuel John
Feb 27, 2025 â‹… 8 min read
how to measure round-trip time using cURL

How to measure round-trip time (RTT) using cURL

Learn how to measure round-trip time (RTT) using cURL, a helpful tool used to transfer data from or to a server.

David Omotayo
Feb 26, 2025 â‹… 10 min read

React.memo explained: When to use it (and when not to)

React.memo prevents unnecessary re-renders and improves performance in React applications. Discover when to use it, when to avoid it, and how it compares to useMemo and useCallback.

Emmanuel John
Feb 26, 2025 â‹… 9 min read
View all posts

3 Replies to "Methods for TypeScript runtime type checking"

  1. One big downside to io-ts and similar libraries, is all your types are inferred.

    This has some major drawbacks compared with literal types: there is nowhere for you to write documentation – or at least nothing that will be visible to IDE auto completion or a documentation generator. Also, error messages may be very difficult to understand – they aren’t going to point to a specific member, but instead to a complex stack of derived types. And lastly, no automated (remame) refactorings or “find usages” will be available, so you miss out on a lot of the productivity aspects of TS.

    I had high hopes for this approach, but I eventually ended up writing both validators and proper types anyhow, meaning a lot of duplication. Just something to consider before selecting this approach.

Leave a Reply