Angular directive and the concept of isolating scopes

I am facing an issue with a directive that dynamically adds divs to the template. Every time I add a new one, the previously created ones are replaced by the new content. I have tried isolating the directive's scope using scope: {} and scope: true, but it does not seem to work.

This is the directive code:

angular.module('bucket.directives', [])     
.directive('bucketList', ['$compile', function($compile) {

  var viaUrlTemplate = '<span class="bucketItem viaUrl">{{ displayName }} <i class="icon-delete">x</i></span>';

  return {
    restrict: 'A',
    link: function(scope, element, attrs) {

      scope.$on('urlBucketAdded', function(event, bucketInfo) {
        scope.displayName = bucketInfo.bucketName;

        scope.$apply(function() {
          var content = $compile(viaUrlTemplate)(scope);
          element.append(content);
        });
      });

    }
  }
}]);

The structure of the HTML looks like this:

<div bucket-list class="bucketList">

  // new elements in 'viaUrlTemplate' get inserted here

</div>

When trying to add new elements with displayName -> Content 1, Content 2, and Content 3, the result is:

<div bucket-list class="bucketList">

 <span class="bucketItem viaUrl"> Content 3 <i class="icon-delete">x</i></span>
 <span class="bucketItem viaUrl"> Content 3 <i class="icon-delete">x</i></span>
 <span class="bucketItem viaUrl"> Content 3 <i class="icon-delete">x</i></span>

</div>

Any help or suggestions would be greatly appreciated. Thank you!

Answer №1

Instead of using a scope variable to contain the displayName, it is possible to simply utilize a regular variable (refer to this example):

scope.$on('urlBucketAdded', function(event, bucketInfo) {
        var displayName = bucketInfo.bucketName;
        var viaUrlTemplate = '<span class="bucketItem viaUrl">' + displayName + '<i class="icon-delete">x</i></span>';

       // scope.$apply(function() {
          var content = $compile(viaUrlTemplate)(scope);
          element.append(content);
      //  });
      });

The directive's `scope` variable will remain unchanged no matter how many template divs are compiled and added to it. This explains why the new `displayName` value replaces the previous values, as you are only updating the scope variable `displayName` in that scenario.

Answer №2

In this specific scenario, there is no need to utilize the $scope within the $compile service.

var content = $compile(viaUrlTemplate)({ displayName: bucketInfo.bucketName });

Simply using a custom object should resolve the problem you are facing.

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