JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://ajax.aspnetcdn.com/ajax/jquery.validate/1.11.0/jquery.validate.min.js"></script>
<script src="http://ajax.aspnetcdn.com/ajax/jquery.validate/1.11.0/additional-methods.js"></script>
<form id="myform">
    <input type="text" name="field1" id="field1" />
    <br/>
    <input type="text" name="field2" id="field2" />
    <br/>
    <input type="text" name="field3" id="field3" />
    <br/>
    <input type="text" name="field4" id="field4" />
    <br/>
    <input type="submit" />
</form>
<a id="docs" href="http://docs.jquery.com/Plugins/Validation" target="_blank">Validation Documentation</a>

CSS

#docs {
    display: block;
    position: fixed;
    bottom: 0;
    right: 0;
}

JavaScript

$(document).ready(function () {

    $('#myform').validate({ // initialize the plugin
        rules: {
            field2: {
                required: {
                    depends: function (element) {
                        return $("#field1").is(":filled");
                    }
                }
            },
            field3: {
                required: {
                    depends: function (element) {
                        return $("#field2").is(":filled");
                    }
                }
            },
            field4: {
                required: {
                    depends: function (element) {
                        return $("#field3").is(":filled");
                    }
                }
            }
        },
        submitHandler: function (form) { // for demo
            alert('valid form submitted'); // for demo
            return false; // for demo
        }
    });

});