Angular关于$anchorScroll的定位滚动

以下是实现定位滚动的代码:

<!DOCTYPE html>
<html  ng-app="app">
<head>
    <meta charset="UTF-8">
    <title>定位滚动</title>
    <style>
        *{
            padding: 0;
            margin: 0;
        }
        ul{
            width: 200px;
            height: auto;
            position: fixed;
            top: 10px;
            right: 0;
        }
        li{
            height: 34px;
            line-height: 34px;
            text-align: center;
            border: 1px solid black;
            list-style: none;
        }
        div{
            width: 200px;
            height: 330px;
            border: 1px solid black;
            margin-top: 10px;
        }
    </style>
    <script src="angular.js"></script>
    <script>
        var app = angular.module('app',[]);
        app.controller('ctrl',function($scope,$location,$anchorScroll){
           $scope.arr = [1,2,3,4,5,6];
            $scope.show = function (id) {
                $location.hash(id);
                $anchorScroll();
            }
        });
    </script>
</head>
<body ng-controller="ctrl">
<ul>
    <li ng-repeat="id in arr" ng-click="show('div'+id)">div{{id}}</li>
</ul>
<div ng-repeat="id in arr" >div{{id}}</div>
</body>
</html>