ValidatorShield

Universal validation for frontend and backend with TypeScript. Includes common rules for browser/Node, plus DB-backed async rules unique and exists for server-side checks with Sequelize or Prisma.

✅ Features

• TypeScript compatible (types shipped)
• Frontend and backend rule set
• DB-backed rules via Sequelize adapter: unique, exists

🔧 Usage

import { validate, setDBAdapter, createSequelizeAdapter } from 'validatorshield';

// Backend only: set adapter once during app boot
// setDBAdapter(createSequelizeAdapter(sequelizeInstance));

const data = {
  email: '[email protected]',
  password: 'secret123',
  password_confirmation: 'secret123',
};

const rules = {
  email: ['required', 'email'], // add 'unique:users,email' on backend
  password: ['required', 'min:6', 'confirmed'],
};

const result = await validate(data, rules);

if (!result.passed) {
  console.log(result.errors);
}

Rules

• required, email, string, number, integer, boolean, array
• min, max, between, size
• url, regex
• in, not_in
• same, different, confirmed
• unique:table,column (backend; requires adapter)
• exists:table,column (backend; requires adapter)

Backend setup (Sequelize)

import { setDBAdapter, createSequelizeAdapter } from 'validatorshield';
setDBAdapter(createSequelizeAdapter(sequelize));

Backend setup (Prisma)

import { setDBAdapter, createPrismaAdapter } from 'validatorshield';
setDBAdapter(createPrismaAdapter(prisma));

API

• validate(data, rules) → { passed: boolean; errors: Record<string, string[]> }
• setDBAdapter(adapter) to enable unique/exists
• createSequelizeAdapter(sequelize) to build the adapter

License

MIT