CodePen Embed - Angular ngKeydown

<html>
  <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.8/angular.min.js"></script>
  <body ng-app="">
    <span>Örnek bir değer giriniz: </span>
    <input ng-keydown="sayi = sayi + 1" ng-init="sayi=0" />

    <h1>{{sayi}}</h1>

  </body>
</html>

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