Occasionally, the view fails to update following an $http request

Although this question has been posed multiple times before, none of the solutions seem to be effective for my issue.

Controller

app.controller('HomeController', function ($scope, $timeout, $http) {

      $scope.eventData = {
        heading: "",
        description: ""
      };

      $http.get("/GetEvents")
        .then(function (response) {

          $scope.eventData.heading = response.data.heading;
          $scope.eventData.description = response.data.description;

          console.log($scope.eventData);
        },
        function (error) {
          console.log(error);
        });

});

HTML

<div>
  <h3>{{eventData.heading}}</h3>
  <p>{{eventData.description}</p>
</div>

Upon refreshing the page, the values for description and heading sometimes do not appear. It seems like they are set to empty strings. This inconsistency is puzzling as the console consistently displays the correct values.

Note* jQuery is also included in the setup.

Answer №1

To ensure a smooth user experience, the data is loaded asynchronously, allowing the HTML to load first and then populating the object $scope.eventData with values from the server response.

One effective way to manage this process is by incorporating a visual indicator such as a loader image. Display the loader.png image before initiating the $http.get("/GetEvents") request, and hide it within the .then() function once the data is received.

Another suggestion:

Utilize the ng-if directive to exhibit a 'loading' message within your DOM elements until the server response is obtained. Here's an example:

<div>
  <h3 ng-if="eventData.heading != ''">{{eventData.heading}}</h3>
  <h3 ng-if="eventData.heading == ''">Loading..</h3>

  <p ng-if="eventData.description !=''">{{eventData.description}</p>
  <p ng-if="eventData.description ==''">Loading..</p>
</div>
 

I hope you find these suggestions helpful. Best of luck!

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