arktype
reflect-metadata
arktype | reflect-metadata | |
---|---|---|
41 | 3 | |
3,375 | 3,132 | |
2.7% | - | |
7.9 | 7.2 | |
5 days ago | about 1 month ago | |
TypeScript | TypeScript | |
MIT License | Apache License 2.0 |
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arktype
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Library for benchmarking TS types
I primarily rely on that approach to benchmark ArkType's types.
- Introducing @arktype/attest: A new approach to type-level testing and benchmarks
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TypeScript please give us types
I was one of the most outspoken supporters of this initiative until I started working on ArkType. That may sound oddly self-serving, and it would be naive to claim objectivity after having invested so much into my own solution to this problem. However, I don't think that's the primary reason I changed my mind.
Since it's not explicitly listed there, I feel I should shout out David Blass and his incredibly cool ArkType project: https://github.com/arktypeio/arktype
He sometimes (used to?) streams himself working on twitch and it's a really comfy place to hang out: https://www.twitch.tv/arktypeio
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Using ArkType for TypeScript runtime validation
ArkType is a runtime validation library that can infer TypeScript definitions one-to-one and reuse them as highly-optimized validators for your data.
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preferred way to type guard api response body?
Could also try ArkType if you haven't seen it.
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Valid runtime typing with Dilav
How would you say the functional chaining style overall compares to a parsed syntax like ArkType?
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Can someone recommend a library for data parsing similar to Zod, but with better support for input transformations/preprocessing?
I'm working on a library called ArkType maybe of interest to you.
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Solving balanced parentheses problem using Dart's type system
If you're interested in the possibilities of this kind of stuff in TypeScript, you should check out ArkType.
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Safer Type Checking At Both Runtime and Compile Time
Have you tried ArkType?
reflect-metadata
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TypeScript please give us types
Counter to this post, as soon as I read the title I knew what this was, & I knew it was speaking exactly to something we've wanted for a long time. This is asking for more official & better supported https://github.com/rbuckton/reflect-metadata .
TypeScript is a compiler. It has a lot of type information during compilation. We could write that type information out into a file. Instead what we do is throw that information out when the compile ends. Taking all that typing information & throwing it away at the end of compile time is a bad dumb & silly limitation. Especially for a language like JavaScript, which historically could be semi-proud it had such a strong Everything Is An Object philosophy running through it (such as the malleable prototype-based inheritance system); so much type information should be on that Class object. Reflect-metadata for example defined new methods on Reflect to store this metadata.
I could not be more delighted to see the pennon of this website go up. We needed a rallying point for this. We needed a rallying point for keeping class data around. A rallying point for enriching the runtime with good actionable data is a good rallying point.
It's not what's afoot here, but I think you're a bit off-base about the impossibility of adding even some type-safety. We might not be able to get exact TS type safety. But we can definitely build some safety in. Owing to the malleable prototype-based type system in JS, we can add getters/setters to objects to do a lot of type checking. This doesn't even begin to explore the possibility of what we might do with es2015's proxies, which could allow even more interesting checks to be layered in. I also wish JS had an official AST (and renderer), so had more official options for code-rewriting that might let us weave in type checks.
What we can do as programmers is limited by what we have at our disposal. Not throwing out all the typing information, keeping it around at runtime, opens a lot of interesting doors.
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Using modern decorators in TypeScript
Second, TypeScript 5.0 cannot emit decorator metadata. Subsequently, it doesnโt integrate with the Reflect API and wonโt work with the reflect-metadata npm package.
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Deconstructing an Object Relationship Mapper (ORM) in Typescript
Database columns will be mapped to domain object properties using decorators. This will include relationships and enum types. reflect-metadata stores metadata about the classes and properties. Most of the work is a simple map for each class, renaming db column properties to domain model properties and vice versa. Reflect.defineProperty holds a list of field metadata on the target class. This is where more database ORM logic could live in the future such as column type, length, etc. A base domain model entity will use this metadata to map the models appropriately.
What are some alternatives?
zod - TypeScript-first schema validation with static type inference
protobuf-ts - Protobuf and RPC for TypeScript
proposal-decorators - Decorators for ES6 classes
sequelize-typescript-decorators - Sequelize (SQL ORM for Node) Typescript Decorator that simplifies declarations of Sequelize models...
trpc - ๐งโโ๏ธ Move Fast and Break Nothing. End-to-end typesafe APIs made easy.
InversifyJS - A powerful and lightweight inversion of control container for JavaScript & Node.js apps powered by TypeScript.
monorepo
di-compiler - A Custom Transformer for Typescript that enables compile-time Dependency Injection
type-level-regexp - ๐ค๐ Type-level RegExp, parse and match string in TypeScript type system.
ferocity - Write Java expression trees, statements, methods and classes with a LISP-like internal DSL
typescript-runtime-type-benchmarks - ๐ Benchmark Comparison of Packages with Runtime Validation and TypeScript Support
typescript-needs-types - TypeScript please give us types.