@hapi/validate

Object Validation

This feature allows you to validate JavaScript objects against a predefined schema. The example demonstrates creating a schema for a user object that requires a name, an age between 10 and 99, and a valid email. The object is then validated against this schema.

{"const schema = Joi.object({ name: Joi.string().required(), age: Joi.number().integer().min(10).max(99), email: Joi.string().email().required() }); const result = schema.validate({ name: 'John Doe', age: 29, email: 'john.doe@example.com' }); if (result.error) { console.error(result.error.details); } else { console.log('Validation passed:', result.value); }"}

Array Validation

This feature enables the validation of arrays, including specifying the type of items the array should contain and any additional constraints on those items. The example shows how to validate an array containing specific string values and numbers within a range.

{"const schema = Joi.array().items(Joi.string().valid('apple', 'banana'), Joi.number().min(1).max(5)); const result = schema.validate(['apple', 3]); if (result.error) { console.error(result.error.details); } else { console.log('Validation passed:', result.value); }"}

Custom Validation

This feature allows for custom validation logic to be defined. The example demonstrates creating a custom validator that checks if a string matches a specific expected value, showcasing the flexibility of @hapi/validate for complex validation scenarios.

{"const customValidator = Joi.string().custom((value, helpers) => { if (value !== 'expectedValue') { return helpers.error('any.invalid'); } return value; }, 'Custom validation description'); const result = customValidator.validate('unexpectedValue'); if (result.error) { console.error(result.error.message); } else { console.log('Validation passed:', result.value); }"}