chapter2/orderDiscountWatch-corrected2.html

<!doctype html>
<html lang='en' ng-app>
<head>
  <title>Shopping Cart</title>
  <link href="bootstrap.css" rel="stylesheet">
</head>

<body>
<div ng-controller="CartController">
  <div ng-repeat="item in items">
    <span>{{item.title}}</span>
    <input ng-model="item.quantity">
    <span>{{item.price | currency}}</span>
    <span>{{item.price * item.quantity | currency}}</span>
  </div>
  <div>Total: {{bill.total | currency}}</div>
  <div>Discount: {{bill.discount | currency}}</div>
  <div>Subtotal: {{bill.subtotal | currency}}</div>
</div>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.0.8/angular.min.js"></script>
<script>
  function CartController($scope) {
    $scope.bill = {};

    $scope.items = [
      {title: 'Paint pots', quantity: 8, price: 3.95},
      {title: 'Polka dots', quantity: 17, price: 12.95},
      {title: 'Pebbles', quantity: 5, price: 6.95}
    ];

    $scope.$watch(function() {
      var total = 0;
      for (var i = 0; i < $scope.items.length; i++) {
        total = total + $scope.items[i].price * $scope.items[i].quantity;
      }
      $scope.bill.total = total;
      $scope.bill.discount = total > 100 ? 10 : 0;
      $scope.bill.subtotal = total - $scope.bill.discount;
    });
  }
</script>
</body>
</html>