JSFiddle - React, Tailwind, and code Playground

HTML

<body ng-app="board">
<div class="popup">
    <form name="order" ng-controller="orderForm" novalidate>
        <fieldset class="form-group">
            <input type="text" ng-model="user.name" class="form-control" placeholder="Имя" title="name"/>
        </fieldset>
        <fieldset class="form-group">
            <textarea ng-model="user.suggestions" class="form-control" placeholder="Ваши пожелания..."
                      title="suggestions" required></textarea>
        </fieldset>
        <fieldset class="form-group">
            <input ng-model="user.email" type="email" class="form-control" placeholder="[email protected]"
                   title="Email" required/>
        </fieldset>
        <div>form is {{order.$valid}}</div>
        <button type="submit">Отправить</button>
    </form>
</div>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.19/angular.min.js"></script>
<script>
    var app = angular.module('board', []);
    app.controller('orderForm', function ($scope) {
        $scope.user = {};
    });
</script>
</body>