formdata-jsonschema

Parse FormData into a json object using jsonschema.

Installation

# npm
npm i formdata-jsonschema

# yarn
yarn i formdata-jsonschema

# pnpm
pnpm i formdata-jsonschema

Usage

import { Schema, formdataToJson } from 'formdata-jsonschema';

const schema: Schema = {
	type: 'object',
	properties: {
		string: { type: 'string' },
		integer: { type: 'integer' },
		number: { type: 'number' },
		boolean: { type: 'boolean' },
		json: { type: 'object', properties: { value: { type: number } } },
		array: { type: 'array', items: [{ type: 'string' }, { type: 'integer' }, { type: 'number' }] }
	}
};

const formdata = new FormData();
formdata.set('string', 'Hello World!');
formdata.set('integer', '1234');
formdata.set('number', '-1234.5678');
formdata.set('boolean', 'true');
formdata.set('json', JSON.stringify({ value: 123 }));
formdata.append('array', 'one');
formdata.append('array', '2');
formdata.append('array', '3.3');

const data = formDataToJson(formdata, schema);

console.log(data);

Validation

This library does not provide any validation methods.

You can use any library that uses jsonschema for validation like ajv.

import { Schema, formdataToJson } from 'formdata-jsonschema';
import Ajv from 'ajv';

const ajv = new Ajv();

const schema: Schema = {
	type: 'object',
	properties: {
		string: { type: 'string' },
		integer: { type: 'number' }
	}
};

const validate = ajv.compile(schema);

const formdata = new FormData();
formdata.set('string', 'Hello World!');
formdata.set('integer', '1234.5678');

const data = formDataToJson(formdata, schema);
const valid = validate(data);

console.log(data);
console.log(valid);

Licence

MIT