FormChecker

A TypeScript library for flexible and customizable form validation with support for synchronous and asynchronous rules.

Features

Define validation rules for each form field.
Supports built-in validation rules such as required, checked, min, max, minLength, maxLength, equal, and regexp.
Supports custom asynchronous validation rules (test).
Handles data transformation before and after validation (onBefore, onAfter).
Returns detailed validation results including errors and custom or default messages.
Contains standard validation error messages in several languages such as: English, Portuguese, Spanish, Chinese, etc.

Installation

With NPM:

npm install form-checker-ts

Or with Yarn:

yarn add form-checker-ts

Example Usage

import { formChecker, type FormCheckerSchema } from 'form-checker-ts';

type Data = {
    name: string;
    email: string;
    password: string;
    password_confirm: string;
};

const schema : FormCheckerSchema<Data> = {
    name: { required: true, minLength: 3, maxLength: 30 },
    email: { required: true, minLength: 5, maxLength: 50 },
    password: { required: true, minLength: 6, maxLength: 20, regexp: [/[a-z]/, /[A-Z]/, /[0-9]/] },
    password_confirm: { required: { ifFilled: 'password' }, equal: 'password' }
};

const data : Data = {
    name: 'Guilherme',
    email: 'contato@gn.dev.br',
    password: 'Q1w2E3r4',
    password_confirm: 'Q1w2E3r4'
};

formChecker(schema, data, 'pt').then(result => {
    console.log(result);
});

Author

Guilherme Neves - github - website

License

This project is under the MIT license - see the LICENSE file for details.

Package detail

form-checker-ts

readme