JSFiddle - React, Tailwind, and code Playground

HTML

<div ng-app>
    <form name="myForm" action="#sent" method="post" ng-app>
        <input name="userPreference1" type="text" ng-model="shipment.userPreference1" />
        <input name="userPreference1" type="text" ng-model="shipment.userPreference2" />
        <input name="userPreference1" type="text" ng-model="shipment.userPreference3" />
        <button type="submit" ng-disabled="!(!!shipment.userPreference1 || !!shipment.userPreference2  || !!shipment.userPreference3)">Submit</button>
    </form>
</div>