@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

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

Compatibility Matrix

License

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