FormValidation

The best validation library for JavaScript.

Biggest collection of validators

40+ validators, 50+ plugins

Cover most various types of form field
Develop, reuse custom validator
Support sync and async validators
Plugin based architectue

Flexible

Localization

Language packages for error message
Support custom message
Support custom validators
Switch between locales
Validate ID and VAT numbers in many countries

Declaring validation rules

Declarative mode

<form id="registrationForm">
    <input
        name="userName"
        data-fv-not-empty="true"
        data-fv-not-empty___message="The username is required"
        data-fv-string-length="true"
        data-fv-string-length___min="6"
        data-fv-string-length___message="The name must be more than 6 characters long"
    />
</form>

Programmatic mode

FormValidation.formValidation(
    document.getElementById('registrationForm'),
    {
        fields: {
            userName: {
                validators: {
                    notEmpty: {
                        message: 'The username is required',
                    },
                    stringLength: {
                        message: 'The name must be more than 6 characters long',
                        min: 6,                        
                    },
                },
            },
        },
    },
);

Integration with your stack

Support native form
Support popular CSS frameworks via plugins
Support popular JavaScript frameworks
Easy to integrate with a framework

Play nice with form libraries

and more!

Supported browsers

Support the latest version of

About

This project is developed by Nguyen Huu Phuoc. I love building products and sharing knowledge.

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form-validation/form-validation

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