typescript-json-schema
typescript-is
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typescript-json-schema | typescript-is | |
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9 | 9 | |
3,030 | 951 | |
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6.3 | 4.2 | |
23 days ago | 10 months ago | |
TypeScript | TypeScript | |
BSD 3-clause "New" or "Revised" License | MIT License |
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typescript-json-schema
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6 Reasons why JSON Schema is worth your time
Typescript to JSON Schema
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Parse, Don't Validate (2019)
For anyone using both TypeScript and JSON schemas, but wanting to use TypeScript as the source of truth, I highly recommend the following library: [ts-json-schema-generator](https://github.com/YousefED/typescript-json-schema).
It does exactly what it says in the box: turns your TypeScript `types` / `interface` into machine-readable JSON schemas.
The library has a few open issues (does not deal well with some edge cases of composing Omit<> on sum types, and does not support dynamic (const) keys), but compared to manually writing JSON schemas, it's been amazing!
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Is it possible to validate a json only according to a type? [node with typescript]
There are a bunch of tools to generate JSON-schema from a TS codebase, ie https://github.com/YousefED/typescript-json-schema
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Input validation in Express from TypeScript
Now that cool thing we wanted to do? This library does exactly that!
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YAML: It's Time to Move On
> For more complex cases I find myself wishing I could just turn Typescript into some kind of schema validation for JSON.
Not sure if this is what you're looking for, and whether it's powerful and expressive enough for your use case, but you can use typescript-json-schema¹ for this, and validate with eg ajv.
¹https://github.com/YousefED/typescript-json-schema
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ts-rs - generate typescript type declarations from rust types
Use https://github.com/YousefED/typescript-json-schema to go from TS -> json schema
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What can I *use* Rust for?
For what it's worth, thanks to TypeScript transformers (a feature baked into the compiler), one can create a transformer library that verifies an object is valid for any TypeScript type and conveys that information to the typechecker. And indeed, it's already been made. It allows to parse unknown into a given T. This is nice, because one can generate a JSON schema out of a TS type, for other languages/codebases to integrate safely.
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JSON Schema bundling finally formalised
This is why I originally started a project to convert ts to json schema; https://github.com/YousefED/typescript-json-schema (and also check out a good alternative https://github.com/vega/ts-json-schema-generator)
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How to use typescript & sails js for your REST API (Safer seas)
Typescript JSON schema
typescript-is
- Good bye "typescript-is" (ancestor of "typia", 20,000x faster validator)
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Typing for JSON Payloads
I'll throw https://github.com/woutervh-/typescript-is in the mix as well.
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Handling json input in an express app
I'm a fan of typescript-is. Provides both compile time and run time validations
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What can I *use* Rust for?
For what it's worth, thanks to TypeScript transformers (a feature baked into the compiler), one can create a transformer library that verifies an object is valid for any TypeScript type and conveys that information to the typechecker. And indeed, it's already been made. It allows to parse unknown into a given T. This is nice, because one can generate a JSON schema out of a TS type, for other languages/codebases to integrate safely.
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Do you use code generators? If so, which ones?
But to make it worth the comment, I’ll point people to typescript-is which uses transformations at compile-time to generate run-time type checking code.
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TypeScript runtime type-checking - designed for simple use, through to enforcing API payload schema
Then there's also typescript-is, which is pretty neat because it converts actual compile-time type definitions to runtime type checks, so it doesn't require changing the type definitions.
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JSON Schema === Runtime Type System for TypeScript
typescript-is. This uses a compile-time transformer to generate code for type-checking. You'll need to use ttypescript instead of typescript to compile your code (I recommend setting this up with ts-patch). It won't work if your build pipeline is actually using something like esbuild or Babel to transpile TS->JS.
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How an Anti-TypeScript “JavaScript developer” like me became a TypeScript fan
If you're not using a bunch of generics, check out typescript-is [1]. It takes little work to get it setup, but it generates run time type checks for you. I understand why typescript decided to not add this functionality to the core of the language, but it's starting to feel like the largest missing piece of typescript is a built-in way to generate run-time type-checks for user-defined types from just the type definition.
The happy medium we've found with that module is using the runtime type-check on anything "unsafe" to bless the result using typescript-is's equals functionality, but still allowing programmers to use casting with a comment justifying its necessity. For us our list of unsafe is results pulled from the db, anything parsed from JSON, and incoming request bodies (which can be a special case of parsing from JSON, but not always).
[1]: https://github.com/woutervh-/typescript-is
What are some alternatives?
ajv - The fastest JSON schema Validator. Supports JSON Schema draft-04/06/07/2019-09/2020-12 and JSON Type Definition (RFC8927)
runtypes - Runtime validation for static types
typebox - Json Schema Type Builder with Static Type Resolution for TypeScript
class-transformer - Decorator-based transformation, serialization, and deserialization between objects and classes.
ron - Rusty Object Notation
class-validator - Decorator-based property validation for classes.
SailsJS - Realtime MVC Framework for Node.js
dhall-lang - Maintainable configuration files
ts-node - TypeScript execution and REPL for node.js
io-ts - Runtime type system for IO decoding/encoding
zod - TypeScript-first schema validation with static type inference