Tips for preserving the value retrieved from a $http request when navigating back in the browser

Question

Tips for preserving the value retrieved from a $http request when navigating back in the browser

In my application, I have a "search" button that retrieves an array of objects from a REST service. These values are then populated into a table using the ng-repeat directive. When a column is clicked, the page navigates to the next page with more details using the $routeProvider.

My query is: How can I retain the values in the table when the browser back button is clicked?

Below is my app.js code snippet:

myApp.config(['$routeProvider', function($routeProvider) {
    $routeProvider
    .when('/displayValues', {
        templateUrl: 'DisplayValues.html',
        controller: 'DisplayValuesController'
    })
    .when('/showDetails/:inputNumber', {
        templateUrl: 'ShowDetails.html',
        controller: 'DetailsController'
    })
    .otherwise({
        redirectTo: '/displayValues'
    });
}]);

javascript angularjs

Answer 1

Answer №1

Discover the role of the reloadOnSearch property in the $routeProvider. When set to false, modifications to querystring values will not prompt a reset of controllers, allowing them to maintain their current state (such as search results).

If you want the detail page navigation to occur via querystring, you must listen for changes using the $routeUpdate event. Refer to the $route documentation for more information.

Alternatively, you can store the search results in a service and reapply them when returning to the list page.

Answer 2

Discover the role of the reloadOnSearch property in the $routeProvider. When set to false, modifications to querystring values will not prompt a reset of controllers, allowing them to maintain their current state (such as search results).

If you want the detail page navigation to occur via querystring, you must listen for changes using the $routeUpdate event. Refer to the $route documentation for more information.

Alternatively, you can store the search results in a service and reapply them when returning to the list page.

Answer 3

Answer №2

In AngularJs, saving state is done through services, which act as singletons and are accessible via dependency injection like all other components.

One way to achieve this is by creating a service like the following (note that this is just a basic example and not necessarily recommended practice):

angular.module('myApp', []).service('valueService', function() {
    var currentValues;

    return{
      setValues: function(newValues) {
        currentValues = newValues;
      },
      getValues: function() {
        return currentValues;
      }
    }
});

Initially, your controller can retrieve data from the service. If the value returned is undefined, you can make an XHR request to the server and then store the value in the service.

While additional logic and modifications may be required, the fundamental concept involves caching results in a service and fetching them from the controller when needed.

Answer 4

In AngularJs, saving state is done through services, which act as singletons and are accessible via dependency injection like all other components.

One way to achieve this is by creating a service like the following (note that this is just a basic example and not necessarily recommended practice):

angular.module('myApp', []).service('valueService', function() {
    var currentValues;

    return{
      setValues: function(newValues) {
        currentValues = newValues;
      },
      getValues: function() {
        return currentValues;
      }
    }
});

Initially, your controller can retrieve data from the service. If the value returned is undefined, you can make an XHR request to the server and then store the value in the service.

While additional logic and modifications may be required, the fundamental concept involves caching results in a service and fetching them from the controller when needed.

Tips for preserving the value retrieved from a $http request when navigating back in the browser

Answer №1

Answer №2

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