Tutorial 12.9 Creating a Directive that Manipulates the DOM

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******************************************INDEX.HTML*****************************************************
<!doctype html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Example - example-directive-link-production</title>
 

  <script src="//code.angularjs.org/snapshot/angular.min.js"></script>
  <script src="script.js"></script>
 

 
</head>
<body ng-app="docsTimeDirective">
  <div ng-controller="Controller">
  Date format: <input ng-model="format"> <hr/>
  Current time is: <span my-current-time="format"></span>
</div>
</body>
</html>
******************************************INDEX.HTML*****************************************************
********************************************script.js***************************************************
((function(angular) {
  'use strict';
angular.module('docsTimeDirective', [])
  .controller('Controller', ['$scope', function($scope) {
    $scope.format = 'M/d/yy h:mm:ss a';
  }])
  .directive('myCurrentTime', ['$interval', 'dateFilter', function($interval, dateFilter) {

    function link(scope, element, attrs) {
      var format,
          timeoutId;

      function updateTime() {
        element.text(dateFilter(new Date(), format));
      }

      scope.$watch(attrs.myCurrentTime, function(value) {
        format = value;
        updateTime();
      });

      element.on('$destroy', function() {
        $interval.cancel(timeoutId);
      });

      // start the UI update process; save the timeoutId for canceling
      timeoutId = $interval(function() {
        updateTime(); // update DOM
      }, 1000);
    }

    return {
      link: link
    };
  }]);
})(window.angular);
********************************************script.js***************************************************

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