do-aki/gist:7771047

## gistfile1.html
<!doctype html>
<html ng-app>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.3/angular.min.js"></script>
<script src="http://code.angularjs.org/1.2.3/angular-animate.min.js"></script>
<script>
function ctrl($scope) {
  $scope.words = [];

  $scope.input = function() {
    $scope.words = $scope.title.split(/[ ,]/);
  };
  $scope.remove = function() {
    var remove_word = this.word;
    $scope.title = $scope.title.split(/[ ,]/)
      .filter(function(v) { return v != remove_word })
      .join(',');
    $scope.input();
  };
}
</script>
<title>{{title}}</title>
</head>
<body ng-controller="ctrl">
  <input type="text" ng-model="title" ng-keyup="input()">
  <ul>
    <li ng-repeat="word in words track by $index" ng-if="word.length">
      {{word}} [<a href="#" ng-click="remove()">x</a>]
    </li>
  </ul>
</body>
</html>
	<!doctype html>
	<html ng-app>
	<head>
	<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.3/angular.min.js"></script>
	<script src="http://code.angularjs.org/1.2.3/angular-animate.min.js"></script>
	<script>
	function ctrl($scope) {
	$scope.words = [];

	$scope.input = function() {
	$scope.words = $scope.title.split(/[ ,]/);
	};
	$scope.remove = function() {
	var remove_word = this.word;
	$scope.title = $scope.title.split(/[ ,]/)
	.filter(function(v) { return v != remove_word })
	.join(',');
	$scope.input();
	};
	}
	</script>
	<title>{{title}}</title>
	</head>
	<body ng-controller="ctrl">
	<input type="text" ng-model="title" ng-keyup="input()">
	<ul>
	<li ng-repeat="word in words track by $index" ng-if="word.length">
	{{word}} [<a href="#" ng-click="remove()">x</a>]
	</li>
	</ul>
	</body>
	</html>