npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2024 – Pkg Stats / Ryan Hefner

@toomuchdesign/ajv-type-provider-json-schema-to-ts

v0.3.0

Published

An ajv type provider based on json-schema-to-ts

Downloads

7

Readme

@toomuchdesign/ajv-type-provider-json-schema-to-ts

Build Status Npm version Coveralls

An ajv type provider based on json-schema-to-ts.

import Ajv from 'ajv';
import { enhanceCompileWithTypeInference } from '@toomuchdesign/ajv-type-provider-json-schema-to-ts';

const ajv = new Ajv();
const compile = enhanceCompileWithTypeInference(ajv.compile.bind(ajv));

const schema = {
  type: 'object',
  properties: {
    foo: { type: 'integer' },
    bar: { type: 'string' },
  },
  required: ['foo'],
  additionalProperties: false,
} as const;

const validate = compile(schema);
let data: unknown = { foo: 6 };

if (validate(data)) {
  // data type inferred from schema
  console.log('Validation ok', data);
} else {
  // validate is the usual AJV validate function
  console.log('Validation ko', validate.errors);
}

Installation

npm i @toomuchdesign/ajv-type-provider-json-schema-to-ts

API

enhanceCompileWithTypeInference

Enhance Ajv compile method with type inference:

import Ajv from 'ajv';
import { enhanceCompileWithTypeInference } from '@toomuchdesign/ajv-type-provider-json-schema-to-ts';

const ajv = new Ajv();
const compile = enhanceCompileWithTypeInference(ajv.compile.bind(ajv));

enhanceValidateWithTypeInference

Enhance Ajv validate method with type inference:

import Ajv from 'ajv';
import { enhanceValidateWithTypeInference } from '@toomuchdesign/ajv-type-provider-json-schema-to-ts';

const ajv = new Ajv();
const validate = enhanceValidateWithTypeInference(ajv.validate.bind(ajv));

Type provider options

enhanceCompileWithTypeInference and enhanceValidateWithTypeInference accept a json-schema-to-ts FromSchema option object to configure inferred types output:

const compile = enhanceCompileWithTypeInference<{ parseNotKeyword: true }>(
  ajv.compile.bind(ajv),
);

const validate = enhanceValidateWithTypeInference<{ parseNotKeyword: true }>(
  ajv.validate.bind(ajv),
);

references option can be used to resolve $ref schema types:

const userSchema = {
  $id: 'http://example.com/schemas/user.json',
  type: 'object',
  properties: {
    name: { type: 'string' },
    age: { type: 'integer' },
  },
  required: ['name', 'age'],
  additionalProperties: false,
} as const;

const usersSchema = {
  type: 'array',
  items: {
    $ref: 'http://example.com/schemas/user.json',
  },
} as const;

// Register ref schema in ajv
ajv.addSchema(userSchema);

const compile = enhanceCompileWithTypeInference<{
  // Register ref schema type provider
  references: [typeof userSchema];
}>(ajv.compile.bind(ajv));

const validate = compile(schema);

if (validate(data)) {
  // Inferred data with resolved $ref schemas
  const expectedData: { name: string; age: number }[] = data;
}

Developer notes

The current API is completely decoupled from Ajv. This means enhancing Ajv methods singularly, bypassing their original type implementation.

A different approach could consist of Ajv exposing a hook to provide external type inference implementation, as done with Fastify's type providers:

import Ajv from 'ajv';
import type { JsonSchemaToTsProvider } from '@toomuchdesign/ajv-type-provider-json-schema-to-ts';

const ajv = new Ajv();
const typedAjv = ajv.withTypeProvider<JsonSchemaToTsProvider>();

Contributing

Any contribution should be provided with a changesets update:

npx changeset