runtypes
type-fest
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runtypes | type-fest | |
---|---|---|
22 | 32 | |
2,545 | 13,184 | |
0.9% | - | |
5.6 | 9.0 | |
2 months ago | 4 days ago | |
TypeScript | TypeScript | |
MIT License | Creative Commons Zero v1.0 Universal |
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runtypes
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When should I use runtime checks (and which runtime checker should I use)?
In terms of which runtime checker I should use. The first tutorial I saw suggested 'Zod', doing a bit more searchign yielded other options such as 'runtypes'.
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An almost religious case for Rust
Runtypes would probably be a better example.
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'The best thing we can do today to JavaScript is to retire it’ Douglas Crockford
this has been solved by several packages, runtypes https://github.com/pelotom/runtypes being my favorite
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How to force a type when importing a JSON file?
I personally like https://github.com/pelotom/runtypes because it bundles your Schema Info and the corresponding Typescript types
- Why doesn’t TypeScript natively do any type checking
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Create d.ts for API response
When I have to deal with data from API calls, I usually use a runtime typing library like Runtypes or Zod to check the responses at the boundary. These libraries can automatically give you TS types (using their static or infer utilities) to use throughout the rest of the project.
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Typing for JSON Payloads
Also runtypes and (as mentioned below) zod.
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How to check that an 'unknown' object has a specific key and that the key is a specific type?
Seconding the recommendation to use a library for this. runtypes and io-ts are two other alternatives.
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Check types at the top level or in each function?
I wouldn't reinvent the wheel: https://github.com/pelotom/runtypes
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Minimal and fast runtime API payload sanitiser and error message handling
What does your library provide that others don't? For example: https://github.com/colinhacks/zodhttps://github.com/hapijs/joihttps://github.com/jquense/yuphttps://github.com/gcanti/io-tshttps://github.com/pelotom/runtypeshttps://github.com/sindresorhus/ow
type-fest
- Adding type safety to object IDs in TypeScript
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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.
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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?
zod - TypeScript-first schema validation with static type inference
ts-toolbelt - 👷 TypeScript's largest type utility library
typescript-is
tss-react - ✨ Dynamic CSS-in-TS solution, based on Emotion
io-ts - Runtime type system for IO decoding/encoding
typegraphql-prisma - Prisma generator to emit TypeGraphQL types and CRUD resolvers from your Prisma schema
ts-essentials - All essential TypeScript types in one place 🤙
ts-auto-guard - Generate type guard functions from TypeScript interfaces
variant - Variant types in TypeScript
nest-clean-architecture - 🏛️ Nest.js clean architecture example following some DDD principles with use-cases written in functionnal programming.
TypeScript - TypeScript is a superset of JavaScript that compiles to clean JavaScript output.