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← Discriminated unions are the most important TypeScript feature, and everyone should be using them more.
17 connected korrents · 15 moments from 6 Nov 2023 to 24 Oct 2026.
Everything filed under TypeScript
TypeScript
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SQLite Same subject Same subject Same subject Same subject Same subject Same subject Same subject Same subject Same subject Same subject Same subject Same subject Same subject Same subject Same subject Same subject Same subject Read this korrent: Discriminated unions are the most important TypeScript feature, and everyone should be using them more. Discriminated unions are the most important TypeScript feature, and everyone should be using them more. Last stated 2 years ago
18 Dec 2024
DM
Dillon Mulroy — holds since 2024-12-18 — tap for who they are
Same subject: A programming language is a ten-year play: version one has issues, version two fixes them, version three is finally good — and only then does adoption start. — tap to centre the map on it A programming language is a ten-year play: version one has issues, version two fixes them, version three is finally good — and only then does adoption start. Last stated 6 months ago
13 May 2026
AH
Anders Hejlsberg — holds since 2026-05-13 — tap for who they are
Same subject: A proprietary language licensed from Microsoft had zero chance in the JavaScript ecosystem: TypeScript had to be open source or nobody would come. — tap to centre the map on it A proprietary language licensed from Microsoft had zero chance in the JavaScript ecosystem: TypeScript had to be open source or nobody would come. Last stated 6 months ago
13 May 2026
AH
Anders Hejlsberg — holds since 2026-05-13 — tap for who they are
Same subject: Because its types are erased before the program runs, TypeScript can afford not to be sound: checking 99% beats the 0% JavaScript checked, and buys features a sound language cannot offer. — tap to centre the map on it Because its types are erased before the program runs, TypeScript can afford not to be sound: checking 99% beats the 0% JavaScript checked, and buys features a sound language cannot offer. Last stated 6 months ago
13 May 2026
AH
Anders Hejlsberg — holds since 2026-05-13 — tap for who they are
Same subject: For a TypeScript team, Rust belongs on the backend — API servers — and not in the front end. — tap to centre the map on it For a TypeScript team, Rust belongs on the backend — API servers — and not in the front end. Last stated 5 months ago
20 May 2026
AR
Alice Ryhl — holds since 2026-05-20 — tap for who they are
Same subject: If you can use Effect for TypeScript, you should -- to the point of not starting a new project without it. — tap to centre the map on it If you can use Effect for TypeScript, you should -- to the point of not starting a new project without it. Last stated 2 months ago
1 Sept 2026
DM
Dillon Mulroy — holds since 2026-01-09 — tap for who they are
DM
Dillon Mulroy — holds since 2026-09-01 — tap for who they are
Same subject: People adopted TypeScript for the tooling, not the types: an erasable type system is worth having because of the productivity the tooling built on it delivers. — tap to centre the map on it People adopted TypeScript for the tooling, not the types: an erasable type system is worth having because of the productivity the tooling built on it delivers. Last stated 6 months ago
13 May 2026
AH
Anders Hejlsberg — holds since 2026-05-13 — tap for who they are
Same subject: React and TypeScript developers are infantilized by the ecosystem's thought leaders; anything beyond a simple CRUD app will need generics, mapped types and memoization. — tap to centre the map on it React and TypeScript developers are infantilized by the ecosystem's thought leaders; anything beyond a simple CRUD app will need generics, mapped types and memoization. Last stated 3 years ago
6 Nov 2023
DM
Dillon Mulroy — holds since 2023-11-06 — tap for who they are
Same subject: Rust's least mature area is the front end: write the backend in Rust and the front end in TypeScript rather than shipping Rust to the browser through WebAssembly. — tap to centre the map on it Rust's least mature area is the front end: write the backend in Rust and the front end in TypeScript rather than shipping Rust to the browser through WebAssembly. Last stated 5 months ago
20 May 2026
AR
Alice Ryhl — holds since 2026-05-20 — tap for who they are
Same subject: For a web developer Linux is simply better than the Mac: closer to what you deploy on, with phenomenal tooling and a reproducible setup. — tap to centre the map on it For a web developer Linux is simply better than the Mac: closer to what you deploy on, with phenomenal tooling and a reproducible setup. Last stated 7 months ago
8 Apr 2026
DH
David Heinemeier Hansson — holds since 2025-07-12 — tap for who they are
DH
David Heinemeier Hansson — holds since 2026-04-08 — tap for who they are
Same subject: Go is no less susceptible to N+1 queries than a metaprogramming-heavy language like Ruby, despite its verbosity. — tap to centre the map on it Go is no less susceptible to N+1 queries than a metaprogramming-heavy language like Ruby, despite its verbosity. Last stated 2 years ago
28 May 2024
BL
Brandur Leach — holds since 2024-05-28 — tap for who they are
Same subject: It is no longer an economically viable enterprise to have humans typing out lines of Ruby, Rust, or C++ because coding agents have become so good. — tap to centre the map on it It is no longer an economically viable enterprise to have humans typing out lines of Ruby, Rust, or C++ because coding agents have become so good. Last stated 4 weeks ago
6 Oct 2026
DH
David Heinemeier Hansson — holds since 2026-10-06 — tap for who they are
Same subject: btrfs copy-on-write feature is great for worktrees but bad for sqlite — tap to centre the map on it btrfs copy-on-write feature is great for worktrees but bad for sqlite Last stated a month ago
1 Oct 2026
PS
Peter Steinberger — holds since 2026-10-01 — tap for who they are
Same subject: Derived data such as a search index should be kept up to date as background work, never inside a foreground user request. — tap to centre the map on it Derived data such as a search index should be kept up to date as background work, never inside a foreground user request. Last stated 8 months ago
16 Mar 2026
KD
Kent C. Dodds — holds since 2026-03-16 — tap for who they are
Same subject: SQLite as a storage engine, with replication added on the outside, is the right core design for a replicated database. — tap to centre the map on it SQLite as a storage engine, with replication added on the outside, is the right core design for a replicated database. Last stated a week ago
24 Oct 2026
PO
Philip O'Toole — holds since 2026-10-24 — tap for who they are
Same subject: A language can keep changing without a Python-2-to-3 break, as long as code written under the old and the new rules can be mixed freely in one program. — tap to centre the map on it A language can keep changing without a Python-2-to-3 break, as long as code written under the old and the new rules can be mixed freely in one program. Last stated 5 months ago
20 May 2026
AR
Alice Ryhl — holds since 2026-05-20 — tap for who they are
Same subject: A tool's speed comes primarily from its design decisions rather than the programming language it is written in. — tap to centre the map on it A tool's speed comes primarily from its design decisions rather than the programming language it is written in. Last stated 10 months ago
29 Dec 2025
AP
Aaron Patterson — holds since 2025-12-29 — tap for who they are
Same subject: Certain programming languages are better suited for agents because strong types and annotations help models understand intent. — tap to centre the map on it Certain programming languages are better suited for agents because strong types and annotations help models understand intent. Last stated 8 months ago
8 Mar 2026
RC
Rui Carmo — holds since 2026-03-08 — tap for who they are
At the centre
Discriminated unions are the most important TypeScript feature, and everyone should be using them more.
Holds Read this korrent →
A programming language is a ten-year play: version one has issues, version two fixes them, version three is finally good — and only then does adoption start.
Holds
A proprietary language licensed from Microsoft had zero chance in the JavaScript ecosystem: TypeScript had to be open source or nobody would come.
Holds
Because its types are erased before the program runs, TypeScript can afford not to be sound: checking 99% beats the 0% JavaScript checked, and buys features a sound language cannot offer.
Holds
For a TypeScript team, Rust belongs on the backend — API servers — and not in the front end.
Holds
If you can use Effect for TypeScript, you should -- to the point of not starting a new project without it.
Holds
People adopted TypeScript for the tooling, not the types: an erasable type system is worth having because of the productivity the tooling built on it delivers.
Holds
React and TypeScript developers are infantilized by the ecosystem's thought leaders; anything beyond a simple CRUD app will need generics, mapped types and memoization.
Holds
Rust's least mature area is the front end: write the backend in Rust and the front end in TypeScript rather than shipping Rust to the browser through WebAssembly.
Holds
For a web developer Linux is simply better than the Mac: closer to what you deploy on, with phenomenal tooling and a reproducible setup.
Holds
Go is no less susceptible to N+1 queries than a metaprogramming-heavy language like Ruby, despite its verbosity.
Holds
It is no longer an economically viable enterprise to have humans typing out lines of Ruby, Rust, or C++ because coding agents have become so good.
Holds
btrfs copy-on-write feature is great for worktrees but bad for sqlite
Holds
Derived data such as a search index should be kept up to date as background work, never inside a foreground user request.
Holds
SQLite as a storage engine, with replication added on the outside, is the right core design for a replicated database.
Holds
A language can keep changing without a Python-2-to-3 break, as long as code written under the old and the new rules can be mixed freely in one program.
Holds
A tool's speed comes primarily from its design decisions rather than the programming language it is written in.
Holds
Certain programming languages are better suited for agents because strong types and annotations help models understand intent.
Holds