@edward644/validate NPM

Validation Library

A validation library that ensures your data structures match specified types or schemas during runtime, making it perfect for handling dynamic or external data sources such as APIs, user inputs, or databases.

Getting Started

Installation

Install the library using npm:

npm install @edward644/validate

Usage

Import the library and start validating:

CJS

const v = require('@edward644/validation').default;

v(123).isNumber().isGreaterThan(0).isLessThan(1000).assert(); // Throws error if validation fails

ESM

import v from '@edward644/validate';

v(123).isNumber().isGreaterThan(0).isLessThan(1000).assert(); // Throws error if validation fails

import v from '@edward644/validate';

v(123).isNumber().isGreaterThan(0).isLessThan(1000).isValid; // Returns boolean

import v from '@edward644/validate';

const vUser = data =>
  v(data).matchesSchema({
    name: e => e.isString().isNotEmpty(),
    age: e => e.isNumber().isGreaterThan(0).optional(),
    email: e => e.isString().isEmail(),
    active: e => e.isBoolean(),
    accounts: e => e.isArray().isNotEmpty().each(i => i.isString().isNotEmpty()),
  });

const user = {
  name: 'John Doe',
  age: 30,
  email: 'john.doe@example.com',
  active: true,
  accounts: ['savings', 'checking']
}

vUser(user).isValid;
vUser(user).assert();