JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="//netdna.bootstrapcdn.com/twitter-bootstrap/2.3.1/css/bootstrap-combined.min.css">
<form name="form" ng-app>
<div class="control-group" ng-class="{true: 'error'}[form.email.$error.email || (submitted && form.email.$error.required)]">
        <label class="control-label" for="email">Your email address</label>
        <div class="controls">
            <input type="email" name="email" ng-model="email" required />
            <span class="help-inline" ng-show="submitted && form.email.$error.required">Required</span>
            <span class="help-inline" ng-show="form.email.$error.email">Invalid email</span>
        </div>
    </div>
   
    <button type="submit" class="btn btn-primary btn-large" ng-click="submitted=true">Submit</button>
</form>