The best validation library for JavaScript.

40+ validators, 50+ plugins

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

• Customize icon
• Customize error message
• Customize error message location
• Customize valid and invalid colors
• Dynamic field
• Enable, disable validators on the fly

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

• 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,                        
                    },
                },
            },
        },
    },
);

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

• Autocomplete
• Color picker
• Custom checkbox
• Custom radio
• Date picker
• International telephone input
• Mask input
• Rich editor
• Select
• Star rating
• Tag input
• Time picker
• Toggle
• Wizard

and more!

Support the latest version of

• Chrome
• Firefox
• Safari
• Opera
• Edge
• Internet Explorer 11

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

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