Stop vibe-debugging. Every exception, every backtrace, grouped so you see patterns, not noise. Learn more →
Top 12 TypeScript typescript-definition Projects
-
feat(aws-lambda): add response streaming types #72417
-
AppSignal
AppSignal knows why the f*#k it crashed. Stop vibe-debugging. Every exception, every backtrace, grouped so you see patterns, not noise.
-
Project mention: TypeScript Mutually Exclusive Unions: From `?: never` to `ExclusifyUnion` | dev.to | 2025-11-06
This is exactly where type-fest’s ExclusifyUnion comes in (which I originally proposed here). It automates the process of adding ?: never based on your union type.
-
Svelte is definitely still my favorite way to build web apps in 2025.
I wasn't (and still am not) the biggest fan of the new Runes syntax, but I've gotten used to it, and it doesn't really hurt my productivity or get in my way that much.
There's definitely an ecosystem gap compared to React, but there are still lots of really good components and frameworks out there. For example, there's a native Svelte version of IBM's Carbon Design[1] which I've used and found to be very high-quality.
And as for arguments that React will keep winning due to LLMs not having enough corpus to learn less-popular frameworks, I've anecdotally had good success with using LLMs to edit and generate Svelte code. There are occasionally some issues (like it generating pre-runes syntax or using deprecated stuff like stores) but it works well enough to be useful, and definitely better than I expected.
[1] https://svelte.carbondesignsystem.com/
-
true-myth
Safe and idiomatic TypeScript types to handle null, error, and async code handling: Maybe, Result, and Task types that are really nice.
-
-
-
-
SaaSHub
SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives
-
-
-
-
-
NOTE:
The open source projects on this list are ordered by number of github stars.
The number of mentions indicates repo mentiontions in the last 12 Months or
since we started tracking (Dec 2020).
TypeScript typescript-definitions discussion
TypeScript typescript-definitions related posts
-
TypeScript Mutually Exclusive Unions: From `?: never` to `ExclusifyUnion`
-
Type-fest – A collection of essential TypeScript types
-
A collection of essential TypeScript types
-
Branded Types for TypeScript
-
Adding type safety to object IDs in TypeScript
-
Enforcing Localization through Types
-
Boost Your JavaScript with JSDoc Typing
-
A note from our sponsor - AppSignal
www.appsignal.com | 5 Oct 2026
Index
What are some of the best open-source typescript-definition projects in TypeScript? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | DefinitelyTyped | 51,446 |
| 2 | type-fest | 17,432 |
| 3 | carbon-components-svelte | 2,914 |
| 4 | true-myth | 1,365 |
| 5 | schema-dts | 1,246 |
| 6 | dts-bundle-generator | 875 |
| 7 | carbon-icons-svelte | 462 |
| 8 | sveld | 453 |
| 9 | type-plus | 413 |
| 10 | paypal-js | 342 |
| 11 | musickit-typescript | 18 |
| 12 | SuiteScript-2.0-Type-Declarations | 15 |
Sponsored
AppSignal knows why the f*#k it crashed.
Stop vibe-debugging. Every exception, every backtrace, grouped so you see patterns, not noise.
www.appsignal.com