我想實現 跳轉按鈕是紅色，刪除按鈕是藍色，添加是白色，但是目前這樣循環的話，全是“btn-warning”這個樣式，也就是紅色！

angular.module('demoAPP').controller('demoCtrl', function($scope) {
  var demoData = [
    {
      "Name" : "操作",
      "action" : "跳转"
    },
    {
      "Name" : "操作",
      "action" : "删除"
    }
    {
      "Name" : "操作",
      "action" : "添加"
    }
  ]
  $scope.demo = demoData;
    });

<table>
    <tr ng-repeat="item  in demo">
      <td>{{item.Name}}</td>
      <td><button type="button" class="btn btn-warning">{{item.action}}</button></td>
    </tr>  
</table>