@spec2ts/jsonschema

@spec2ts/jsonschema is an utility to create TypeScript types from JSON schemas. Unlike other code generators @spec2ts/jsonschema does not use templates to generate code but uses TypeScript's built-in API to generate and pretty-print an abstract syntax tree (AST).

Features

• AST-based: Unlike other code generators @spec2ts/jsonschema does not use templates to generate code but uses TypeScript's built-in API to generate and pretty-print an abstract syntax tree.
• Tree-shakeable: Individually exported types allows you to bundle only the ones you actually use.
• YAML or JSON: Use YAML or JSON for your JSON Schemas.
• External references: Resolves automatically external references and bundle or import them in generated files.
• Implementation agnostic: Use generated types in any projet or framework.

Installation

Install in your project:

npm install @spec2ts/jsonschema

CLI Usage

jsonschema2ts [options] <input..>

Generate TypeScript types from JSON Schemas

Positionals:
  input  Path to JSON Schema(s) to convert to TypeScript                [string]

Options:
  --version     Show version number                                    [boolean]
  --help        Show help usage                                        [boolean]
  --output, -o  Output directory for generated types                    [string]
  --cwd, -c     Root directory for resolving $refs                      [string]
  --avoidAny    Avoid the `any` type and use `unknown` instead         [boolean]
  --enableDate  Build `Date` for format `date` and `date-time`         [boolean]
  --banner, -b  Comment prepended to the top of each generated file     [string]

Programmatic Usage

import { printer } from "@spec2ts/core";
import { parseSchema, JSONSchema } from "@spec2ts/jsonschema";

async function generateSchema(schema: JSONSchema): Promise<string> {
    const result = await parseSchema(schema);
    return printer.printNodes(result);
}

Implementations

• [x] Primitive types:
  • [x] array
  • [x] boolean
  • [x] integer
  • [x] number
  • [x] null
  • [x] object
  • [x] string
  • [x] homogeneous enum
  • [x] heterogeneous enum
• [x] Special types:
  • [x] Date (date and date-time formats)
  • [x] Blob (binary format)
• [x] Automatic type naming:
  • [x] From id
  • [x] From path
  • [x] From title
• [ ] Custom JSON-schema extensions
• [x] Nested properties
• [x] Schema definitions
• [x] Schema references
  • [x] Local (filesystem) schema references
  • [x] External (network) schema references
• [x] Modular architecture
  • [x] Import local references
  • [x] Embed external references
• [x] allOf ("intersection")
• [x] anyOf ("union")
• [x] oneOf (treated like anyOf)
• [ ] maxItems
• [ ] minItems
• [x] additionalProperties of type
• [ ] patternProperties (partial support)
• [x] extends (with allOf)
• [x] required properties on objects
• [ ] validateRequired
• [ ] literal objects in enum
• [x] referencing schema by id

Compatibility Matrix

TypeScript version	spec2ts version
v3.x.x	v1
v4.x.x	v2

License

This project is under MIT License. See the LICENSE file for the full license text.