JSFiddle - React, Tailwind, and code Playground
by justbn
HTML
<div ng-app="app" ng-controller='AppCtrl'>
<form name="signup">
<input type="text" name="firstname" id="firstname" placeholder="First Name Please" required="" ng-model="firstname" ng-minlength="3" ng-maxlength="50"
ng-class="{'error': !signup.firstname.$valid && !signup.firstname.$pristine, 'pristine': signup.firstname.$pristine }" >
</form>
</div>
CSS
.error {
background-color: red;
}
.pristine {
background-color: green;
}
JavaScript
var app = angular.module('app', []);
app.controller('AppCtrl', [ '$scope', function($scope) {
}]);