angularjs的ng-keyup事件之回車事件

<!doctype html><html><head><meta charset="utf-8"><title>test</title><script src="angular.min.js"></script><script>var myApp = angular.module("myApp", []);    myApp.controller("testCtrl", function($scope){        $scope.myClass = 'red';        $scope.isClick = 'No!';        $scope.myKeyup = function(e){            var keycode = window.event?e.keyCode:e.which;            if(keycode==13){                $scope.myClass = 'green';                $scope.myClick();            }        };        $scope.myClick = function(){            $scope.isClick = 'Yes!';        };    });</script><style>.red {color:red}.green {color:green}</style></head><body><div ng-app="myApp">  <div ng-controller="testCtrl">    <input ng-keyup="myKeyup($event)" type="text" />    <ul>      <li ng-click="myClick()" class="{{myClass}}">{{isClick}}</li>    </ul>  </div></div></body></html>
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