conditional_fields.js

// Call this function with a form as parameter everytime an input changes

function checkConditions(form) {
    let conditions = [];
    form.find('div[data-conditional] :input').each(function(){
       let value = $(this).val();
       conditions.push(value);
    });

    $.each(conditions, function( index, value ) {
        form.find('div[data-condition]').hide();
        form.find('div[data-condition="' + value + '"]').each(function(){
            $(this).show();
        });
    });
}


// Example:
const form = $('form[name="my-form"]');
form.find(':input').change(function(){
    checkConditions(form);
});