ValidnoTypeScript Validation Library

Lightweight and flexible runtime data validation for Node.js applications

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Type Safe

Written in TypeScript with full type definitions and support for built-in and custom types

Flexible Rules

Comprehensive set of validation rules for strings, numbers, arrays, and custom logic

Nested Objects

Full support for nested object validation with intuitive schema definition

Custom Messages

Define custom error messages for validation failures with detailed context

Partial Validation

Validate only specific keys when needed for efficient partial updates

Zero Dependencies

Lightweight library with no external dependencies, perfect for any Node.js project

Quick Example

javascript

import Schema from 'validno';

// Define your schema
const userSchema = new Schema({
  name: {
    type: String,
    required: true,
    rules: {
      lengthMin: 2,
      lengthMax: 50
    }
  },
  email: {
    type: String,
    required: true,
    rules: {
      isEmail: true
    }
  },
  age: {
    type: Number,
    required: false,
    rules: {
      min: 18,
      max: 120
    }
  }
});

// Validate data
const userData = {
  name: "Barney Stinson",
  email: "barney@himym.com",
  age: 35
};

const result = userSchema.validate(userData);

if (result.ok) {
  console.log('Validation passed!');
} else {
  console.log('Errors:', result.errors);
}

Installation

bash

npm i validno