<form ng-app="" name="myForm">
Email:
<input type="email" name="myAddress" ng-model="text">
<span ng-show="myForm.myAddress.$error.email">Not a valid e-mail address</span>
</form>
<body ng-app="">
<p>Try writing in the input field:</p>
<form name="myForm">
<input name="myInput" ng-model="myInput" required>
</form>
<p>The input's valid state is:</p>
<h1>{{myForm.myInput.$valid}}</h1>
</body>
<style>
input.ng-invalid {
background-color:pink;
}
input.ng-valid {
background-color:lightgreen;
}
</style>
<body ng-app="">
<p>Try writing in the input field:</p>
<form name="myForm">
<input name="myName" ng-model="myName" required>
</form>
<p>The input field requires content, and will therefore become green when you write in it.</p>
<style>
form.ng-pristine {
background-color:lightblue;
}
form.ng-dirty {
background-color:pink;
}
</style>
<body ng-app="">
<form name="myForm">
<p>Try writing in the input field:</p>
<input name="myName" ng-model="myName" required>
<p>The form gets a "ng-dirty" class when the form has been modified, and will therefore turn pink.</p>
</form>