JSFiddle - React, Tailwind, and code Playground

HTML

<form action="http://stackoverflow.com" target="_blank">
Book <input type="text" name="book" /><br />
Music <input type="text" name="music" /><br />
TV <input type="text" name="tv" /><br />
<button type="submit">Submit</button>
</form>

JavaScript

window.onload = function() {
    for (var i = 0; i < document.forms.length; i++) {
        var oForm = document.forms[i];
        oForm.onsubmit = function() {
            for (var j = 0; j < this.elements.length; j++) {
                var element = this.elements[j];
                if (element.type === "text" && element.value === "")
                    element.disabled = true;
            }
        };
    }
};