为什么 "hello world" angularJS 代码会在 Plunker 上抛出很多错误?

Why does "hello world" angularJS code throws A LOT OF errors on Plunker?

可在以下位置查看演示:

http://plnkr.co/edit/tLiAWIQ3bCAo4z4VFYTc?p=preview

script.js

var app=angular.module('app',[])
app.controller('MyController', function($scope) {
  console.log("TEST")
  $scope.on("$destroy", function() {console.log("DESTROY")})
})

index.html:

<!DOCTYPE html>
<html ng-app='app'>

  <head>
    <script data-require="angular.js@*" data-semver="1.4.0-beta.3" src="https://code.angularjs.org/1.4.0-beta.3/angular.js"></script>
    <link rel="stylesheet" href="style.css" />
    <script src="script.js"></script>
  </head>

  <body ng-controller="MyController">
    <h1>Hello Plunker!</h1>
  </body>

</html>

有没有人知道为什么 plunkr 会抛出这么多错误?有办法解决这个问题吗?

代码有误:

$scope.on("$destroy", function() {console.log("DESTROY")})

右:

$scope.$on("$destroy", function() {console.log("DESTROY")})