Usage

A validator can be created either for a single value or for many values. More information on how to configure Validate.JS constraints can be found here.

Single value validation

Using the Validate.js library validators and configuration, call makeValidator and pass the desired constraints. The resulting function can then be used to validate specific values.

import makeValidator from "can-validate-validatejs";
const validateAge = makeValidator( {
    numericality: true
} );

const age = "hello";
validateAge( age ); //> ['is not a number']

const anotherAge = 35;
validateAge( anotherAge ); //> undefined

Multiple value validation

Using the many works similar to makeValidator, except that makeValidator.many produces a validator that expects an object of values. The validator will run constraints on respective values based on the keys provided.

import makeValidator from "can-validate-validatejs";
const validatePerson = makeValidator.many( {
    age: {
        numericality: true
    },
    name: {
        presence: true
    }
} );

const invalidPerson = {
    name: "",
    age: "hello"
};
validatePerson( invalidPerson ); //> {name: ['is required'], age: ['is not a number']}

const validPerson = {
    name: "Juan",
    age: 35
};
validatePerson( validPerson ); //> undefined