Multi-select widget angular js

HTML

<link rel="stylesheet" href="http://netdna.bootstrapcdn.com/twitter-bootstrap/2.3.2/css/bootstrap-combined.min.css">
<script src="http://codeorigin.jquery.com/jquery-1.10.2.min.js"></script>
<script src="http://code.angularjs.org/1.0.7/angular.min.js"></script>
<div ng-controller="MyCtrl">
  <multi-select ng-model="user.roles" available="roles" selected-label="Current roles" available-label="Available roles" display-attr="roleName"></multi-select>
    <div>{{ user.username }}'s roles: </div>
    <ul>
        <li ng-repeat="role in user.roles">{{ role.roleName }}</li>
    </ul>   
    <button ng-click="changeRoles()">Change Roles</button>
    <div label="Console:">
    {{roles}}
    </div>
</div>

CSS

.multiSelect {
    overflow: auto;
}
.multiSelect .select {
    margin-right: 20px;
    float: left;
}
.multiSelect .text {
    clear: both;
    font-size: 11px;
}
.multiSelect label::after {
    content: ":";
}
.btn.mover {
    display: block;
    margin-top: 25px;
    vertical-align: top;
}
.btn.mover.left {
    padding: 3px 8px 2px 6px;
}
.btn.mover.right {
    margin-top: 24px;
    padding: 3px 7px 2px;
}
.btn.mover i {
    margin: 0;
}

/* demo css */
li {
    list-style-type: disc;
}
}

JavaScript

var myApp = angular.module('myApp',[]);

myApp.controller('MyCtrl', function($scope) {
    $scope.roles = [
        {roleId: 1, roleName: "Administrator"},
        {roleId: 2, roleName: "Super User"}
    ];
    
    $scope.consoleMessages ="";
    
    $scope.user = {
        userId: 1, 
        username: "JimBob",
        roles: [$scope.roles[0]]
    };
    $scope.changeRoles = function() {
    	$scope.roles = [
        {roleId: 3, roleName: "New Administrator"},
        {roleId: 4, roleName: "New Super User"}
    	];	
    	console.log("rolses");
    } 
});

myApp.directive('multiSelect', function($q) {
  return {
    restrict: 'E',
    require: 'ngModel',
    scope: {
      selectedLabel: "@",
      availableLabel: "@",
      displayAttr: "@",
      available: "=",
      model: "=ngModel"
    },
    template: '<div class="multiSelect">' + 
                '<div class="select">' + 
                  '<label class="control-label" for="multiSelectSelected">{{ selectedLabel }} ' +
                      '({{ model.length }})</label>' +
                  '<select id="currentRoles" ng-model="selected.current" multiple ' + 
                      'class="pull-left" ng-options="e as e[displayAttr] for e in model">' + 
                      '</select>' + 
                '</div>' + 
                '<div class="select buttons">' + 
                  '<button class="btn mover left" ng-click="add()" title="Add selected" ' + 
                      'ng-disabled="selected.available.length == 0">' + 
                    '<i class="icon-arrow-left"></i>' + 
                  '</button>' + 
                  '<button class="btn mover right" ng-click="remove()" title="Remove selected" ' + 
                      'ng-disabled="selected.current.length == 0">' + 
                    '<i class="icon-arrow-right"></i>' + 
                  '</button>' +
                '</div>' + 
                '<div class="select">' +
                  '<label class="control-label"...