Simple Object Schema Validation

// 1. Define a function for validation to return undefined or an error object import Joi from 'joi'; function validate(params = {}) { const result = Joi.validate(params, { name: Joi.string().required(), sex: Joi.string().uppercase().valid('boy'), is_student: Joi.boolean(), }); // Always return the first error object return result.error && result.error.details && result.error.details[0]; } // 2. Call and Validate const validationError = validate(params); if (validationError) { // Error handling right here }