magento2: how validation work in magento2

Question

In magento1 we can check validation like this:

var formToValidate = $('form-validate');
    var validator = new Validation(formToValidate);
    if(validator.validate()) {
        // Here we can code after validation.
    }

but in magento2 i want to check all validation but don't want to submit form after success. so how can I perform with magento2 form?

Answer 1

Try this:

require(["jquery"], function ($) {
    $(document).ready(function () {
        $('#my-button-name').click(function () { // The button type should be "button" and not submit
            if ($('#form-name').valid()) {
                alert("Validation pass");
                return false;
            }
        });
    });
});

Hope this helps!

Answer 2

You can use solution where you have data-mage-init valition

  require([
        'jquery',
        'jquery/ui'
    ], function($){
        $(".MYbuttonClass").on("click", function() {

           if ( $('.form-Class').validation() && $('.form-cart').validation('isValid') === true) {
                //Submit form    
                $('.form-Class').submit();

            }

        });

    });