validator-handler

Tiny library to validate and set custom error messages easily.

Installation and usage

Install the package:

npm i validator-handler

Example

import validate, { validator, isNotValid, isValid } from 'validator-handler';
 
const inputs = {
    name: "Thiago Silva",
    email: "emaildfdf.com",
    password: "123a"
};
 
const isIncluded = (pattern) => data => pattern.test(data)
 
// `validator` is a third-party library with its own sets of validators that you can use;
// or create your own custom function.
const validations = {
    name: ["Please enter a name.", validator.notEmpty],
    email: [
        "Please enter an email address.", validator.notEmpty,
        "Invalid email address.", validator.isEmail
    ],
    password: [
        "Be at least 8 characters or longer.", (x) => x.length >= 8,
        "Include at least one number or symbol", isIncluded(/[0-9!@#$%¨&*_()+.]/),
        "Uppercase and lowercase letter are required.", isIncluded(/(?=[A-Z])(?=[a-z])/)
    ]
};
 
const results = validate(inputs, validations);
/*
OUT: { email: [ 'Invalid email address.' ],
       password: [ 'Be at least 8 characters or longer.',
                   'Uppercase and lowercase letter are required.' ] }
*/
 
// check if results is valid
if (isValid(results)) {
    ...
}
 
// check if results is not valid
if (isNotValid(results)) {
    // handling error messages
    ...
}

Details

Functions available	Description
validate(toValidate, validations)	Validate inputs and return error messages if any input invalid.
isValid(results)	Check if results is valid.
isNotValid(results)	Opposite of isValid function.
validator	A library of string validators and sanitizers - list of validators