JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://jquery.bassistance.de/validate/jquery.validate.js"></script>
<form name="itemForm" id="itemForm" method="post">
<input type="checkbox" name="check1" id="check1" class="require-one" value="1" />
<input type="checkbox" name="check2" id="check2" class="require-one" value="2" />
<input type="text" class="required" />
<input type="submit" />
</form>

JavaScript

$("#itemForm").validate({
rules: { 
    'check1': {  
        required: {
            depends: function(element) {
                return $('.require-one:checked').size() > 0;
            }
        } 
    } 
}
});