<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title></title>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.2/angular.min.js"></script>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css">
</head>
<body ng-app="app">
<div ng-controller="ctrlName">
<div class="container">
<h3>Ng-Focus</h3>
<input type="date" class="form-control" ng-model="dt" ng-focus="displayDate()" ng-blur="hideDate()" /><br />
</div>
</div>
<script>
var app = angular.module("app", []);
app.controller('ctrlName', ['$scope', function ($scope) {
$scope.displayDate = function () {
$scope.dt = new Date();
};
$scope.hideDate = function () {
$scope.dt = null;
};
}]);
</script>
</body>
</html>