The AngularJS ng-if directive is failing to function properly, despite the logged boolean accurately reflecting the

I created a custom directive that handles the visibility of text elements on a webpage. While this logic works correctly half of the time, it fails the other half of the time. Here is the code snippet from my directive:

newco.directive 'heroHeadline', ($routeParams, $interpolate, $rootScope, paramsStateService) ->
  restrict: 'E'
  templateUrl: '/pages/shared/hero_headline'
  scope:
    marquee: "="
  link: (scope, el, attrs) ->
    scope.displayInternationalCopy = false
    scope.displayHeadline2 = false
    if paramsStateService.customerCategoryId is 'international'
       scope.displayInternationalCopy = true
    else
      classification = $routeParams.classification
      classification ?= 'us'
      doubleHeadlineClassifications = ["latino", "us"]
      scope.displayHeadline2 = if classification in doubleHeadlineClassifications then true

    console.log(scope.displayInternationalCopy)

This is the template used:

p.uppercase(ng-if="!displayInternationalCopy")
  | Dishworld is now Sling International
  h1.invert
    span.copy The #1 International
    span.copy TV Service in the U.S.
  p Sign up today for as low as $25/mo. (and sometimes lower!)
h1#marquee-headline-1.invert ng-if="displayInternationalCopy"
  interpolate(value="{{ marquee.headline1 | heroHeadline | perMonth }}" params="basePack")
h2#marquee-headline-2 ng-hide="displayHeadline2 "
  interpolate(value="{{ marquee.headline2 | heroHeadline | perMonth }}" params="basePack")
  | {{displayHeadline2}}

Even though the console.log shows displayInternationalCopy as false, the top part of the template still renders. On the contrary, when displayInternationalCopy is true, it displays correctly. This particular pattern has been utilized successfully in various parts of the application, which makes this issue puzzling.

Here's how the directive appears in the view:

section.jumbotron#international style="background-color: #000" ng-class="{lefty: isDomestic, white: !isDomestic }"
  img#hero.hidden-xs height='616'  src="{{ marquee.heroImage }}"

  .p ng-class="{hero_gradient: !isDomestic}"
  .transbox.visible-xs
  .copy-international
    .container-fluid
      .container
        hero-headline(marquee="marquee")
        a.btn.btn-primary.btn-lg#watch_now(role="button" rel="nofollow" ng-click="signUp($event); toggleHBO(false); " user-flow="")
          | {{ classification.cta_button }}
        hero-attribution

Answer №1

If your directive is using isolated scope, it means that a new scope is being created that is not inherited from its parent. This results in the inability to access the parent scope directly within the directive. To solve this, you can either use $parent. to reference the parent scope like

scope.$parent.displayInternationalCopy
OR include the displayInternationalCopy variable within the isolated scope by using displayInternationalCopy: '='. This allows the displayInternationalCopy scope variable of the parent to be accessible within your directive's scope.

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