ajv-draft-04

What is ajv-draft-04?

The ajv-draft-04 package is an extension for AJV, a popular JSON schema validator, enabling it to validate schemas written according to the JSON Schema Draft 04 specification. This package allows users to leverage AJV's fast validation capabilities while ensuring compatibility with older schema versions.

What are ajv-draft-04's main functionalities?

Validating JSON objects against a Draft 04 schema

This code demonstrates how to create a new AJV instance compatible with Draft 04 schemas, compile a schema, and validate a JSON object against it. It checks if the object meets the schema requirements (in this case, having a name as a string and an age as a number not less than 18), and prints whether the object is valid or not.

{"const Ajv = require('ajv-draft-04'); const ajv = new Ajv(); const schema = { 'type': 'object', 'properties': { 'name': { 'type': 'string' }, 'age': { 'type': 'number', 'minimum': 18 } }, 'required': ['name', 'age'] }; const validate = ajv.compile(schema); const valid = validate({ 'name': 'John Doe', 'age': 25 }); if (valid) console.log('Valid!'); else console.log('Invalid: ' + ajv.errorsText(validate.errors));"}

Other packages similar to ajv-draft-04

jsonschema

The jsonschema package is a JSON Schema validator that supports various draft versions, including Draft 04. It provides a straightforward way to validate JSON data. Compared to ajv-draft-04, jsonschema is more focused on simplicity and direct implementation of the JSON Schema specification, potentially making it less performant but easier to use for basic validation tasks.

tv4

Tiny Validator (tv4) is a lightweight JSON Schema validator that supports Draft 04 of the JSON Schema. It's designed to be simple and fast, making it a good choice for projects that require basic validation without the need for the latest schema features. Compared to ajv-draft-04, tv4 offers a simpler API and smaller footprint at the expense of some of the advanced optimization and features found in AJV.

README

ajv-draft-04

Ajv with JSON Schema draft-04 support

Usage

You need to install both ajv and this package (to allow upgrading ajv without upgrading this package):

npm i ajv ajv-draft-04

// ESM/TypeScript import
import Ajv from "ajv-draft-04"
// Node.js require:
const Ajv = require("ajv-draft-04")

const ajv = new Ajv()

See ajv site for documentation.

Tests

npm install
git submodule update --init
npm test

License

MIT