JSFiddle - React, Tailwind, and code Playground
HTML
<div ng-app="myApp" ng-controller="dummy">
<form name="test">
<input name="status" id="status" ng-model="campaign.status" ng-change="change('status')">
<button type="submit" ng-disabled="!test.status.$dirty">Send</button>
</form>
</div>
CSS
123
JavaScript
angular.module('myApp', [])
.controller('dummy', ['$scope', function ($scope) {
}]);