variant
Variant types in TypeScript (by paarthenon)
type-fest
A collection of essential TypeScript types (by sindresorhus)
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featured
| variant | type-fest | |
|---|---|---|
| 5 | 32 | |
| 178 | 13,261 | |
| - | - | |
| 0.0 | 9.0 | |
| 2 months ago | 1 day ago | |
| TypeScript | TypeScript | |
| Mozilla Public License 2.0 | Creative Commons Zero v1.0 Universal |
The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
variant
Posts with mentions or reviews of variant.
We have used some of these posts to build our list of alternatives
and similar projects. The last one was on 2023-10-01.
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Building React Components Using Unions in TypeScript
Variant
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ADTs in Typescript
When working in a TS codebase I'll lean on this variant library, which works pretty well as far as simple sum types go (v3 is great but not stable yet).
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disc-union - (yet another) library for working with discriminated union types
About half-way through writing this library I discovered that Variant existed... and does a great job at doing the exact same things (and more). I might not have started if I knew about that, but I'm glad I did because it has been a great learning experience!
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ts-pattern: pattern matching library for TypeScript, with smart type inference
Oddly enough, this feature alone has been a a big draw to Rust, Haskell and functional programming in general for me... so it's nice that there's libs filling the gap for TypeScript. Here's another one I haven't gotten around to trying yet either.
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Tool to normalize types (specifically intersections)?
I had to solve this for a project of mine.
type-fest
Posts with mentions or reviews of type-fest.
We have used some of these posts to build our list of alternatives
and similar projects. The last one was on 2024-01-30.
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Adding type safety to object IDs in TypeScript
Related: https://github.com/sindresorhus/type-fest/blob/main/source/o...
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Enforcing Localization through Types
Typescript doesn’t natively provide an Opaque type that we can use to define a string that has already been localized. If the data looks like a string, Typescript will consider it a string. We can however use utility types that simulate opaque types, like the Opaque definition in type-fest:
- Is there a better way to do read-only types
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Boost Your JavaScript with JSDoc Typing
With these powerful features, you can create dynamic and expressive types. One last thing I want to mention before moving on, is that you can install libraries with which you can add more types to your project like type-fest or utility-types. These libraries contain a lot of useful types that you can use in your project.
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Essential Code Organization Principles
Also, it’s not as restrictive as mutability tools — if you know what you are doing and want to ignore this limitation for a particular case, you can apply the -readonly modifier or the Writeable type from type-fest or ts-essentials.
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Best practice for typing server data for get vs post in client code
Remember you can derive one type from another type so you can make sure they don't diverge. SetOptional type util
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All JavaScript and TypeScript features of the last 3 years explained
Some folks have built whole SQL databases and DSL compilers in the TS type system. These tend to be toy projects with disclaimers not to use them. But the type system being Turing complete[0] (for better or worse), pretty much whatever you can imagine. This project[1] is one I actually return to frequently for practical ideas.
0: https://github.com/microsoft/TypeScript/issues/14833
1: https://github.com/sindresorhus/type-fest
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Question on how to handle an object that can have different states and avoid assertions.
Have a look at SetRequired and SetOptional in type-fest
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Preventing more parameters being passed than needed by a type definition?
Try the Exact method provided by Type Fest, looks like it does what you're looking for
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Creating a derived type of only required parameters from a base type?
This is a fairly common scenario and available via libraries like type-fest or implementable with a couple lines of code.
What are some alternatives?
When comparing variant and type-fest you can also consider the following projects:
boxed - Essential building-blocks for functional & safe TypeScript code
ts-toolbelt - 👷 TypeScript's largest type utility library
TypeScript - TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
runtypes - Runtime validation for static types
ts-pattern - 🎨 The exhaustive Pattern Matching library for TypeScript, with smart type inference.
tss-react - ✨ Dynamic CSS-in-TS solution, based on Emotion
ts-essentials - All essential TypeScript types in one place 🤙
zod - TypeScript-first schema validation with static type inference
io-ts - Runtime type system for IO decoding/encoding
fp-ts - Functional programming in TypeScript
utilities - Repository of utilities for deno written in typescript for trailmix🌤🦕🍣😼