If the internet connection drops, I would like to show an alert notifying me about the status

Question

If the internet connection drops, I would like to show an alert notifying me about the status

Can someone provide guidance on how to display an alert message indicating loss of internet connection using AngularJS in my app?

I am currently working with the AngularJS Express framework and APIs. When I encounter a situation where the internet connection is lost while working on the app, I want to trigger a pop-up alert and temporarily halt any HTTP requests until the internet connection is restored.

I have attempted to use offline.js but have not been successful in solving this issue. If anyone knows of a simple and straightforward method to achieve this, please share your insights. Thank you! I have included all necessary scripts and stylesheets in the header as shown below:

<script src="/javascripts/plugins/offlinechecking/offline.min.js"></script>
<link rel="stylesheet" href="/stylesheets/themes/offline-theme-chrome.css" />
<link rel="stylesheet" href="/stylesheets/themes/offline-language-english.css" />
<script>
  Offline.options = {
    checkOnLoad: false,
    interceptRequests: true,
    reconnect: {
      initialDelay: 3,
      delay: (1.5 * last delay, capped at 1 hour)
    },
    requests: true,
    game: false
</script>

javascript angularjs

Answer 1

Answer №1

If you're looking to monitor internet connectivity, consider utilizing both online and offline events:

app.run(function($window, $rootScope) {
      $rootScope.online = navigator.onLine;
      $window.addEventListener("offline", function () {
        $rootScope.$apply(function() {
          $rootScope.online = false;
        });
      }, false);
      $window.addEventListener("online", function () {
        $rootScope.$apply(function() {
          $rootScope.online = true;
        });
      }, false);
});

For more insights on this topic, refer to: How to check internet connection in AngularJs

Additionally, remember to properly close your Offline.options object for optimal functionality:

Offline.options = {
// Ensure proper closing of the object.

Answer 2

If you're looking to monitor internet connectivity, consider utilizing both online and offline events:

app.run(function($window, $rootScope) {
      $rootScope.online = navigator.onLine;
      $window.addEventListener("offline", function () {
        $rootScope.$apply(function() {
          $rootScope.online = false;
        });
      }, false);
      $window.addEventListener("online", function () {
        $rootScope.$apply(function() {
          $rootScope.online = true;
        });
      }, false);
});

For more insights on this topic, refer to: How to check internet connection in AngularJs

Additionally, remember to properly close your Offline.options object for optimal functionality:

Offline.options = {
// Ensure proper closing of the object.

Answer 3

Answer №2

Your choices:

Add an event listener on the window, document, or document.body.
Set the .ononline or .onoffline properties on document or
document.body to a JavaScript Function object.
Specify ononline="..." or onoffline="..." attributes on the
tag in the HTML code

I will illustrate the simplest method.

In your controller

document.body.onoffline = function() {
   alert('You are offline now');
   $scope.connection = 'offline' 
}

document.body.ononline = function() {
   alert('You are online again');
   $scope.connection = 'online' 
}

Check the value of $scope.connection before making any requests.

Additional information for Comment1

If you want the variable to be global, assign it in a factory

myApp.factory('connectionStatus', function(){
   var connection;

   return connection;
})

Then use this factory wherever necessary. This is how you would implement it in your main controller where you define the events.

myApp.controller('mainController', function($scope, connectionStatus) {
    document.body.onoffline = function() {
           alert('You are offline now');
           connectionStatus = 'offline' 
    }
})

Answer 4

Your choices:

Add an event listener on the window, document, or document.body.
Set the .ononline or .onoffline properties on document or
document.body to a JavaScript Function object.
Specify ononline="..." or onoffline="..." attributes on the
tag in the HTML code

I will illustrate the simplest method.

In your controller

document.body.onoffline = function() {
   alert('You are offline now');
   $scope.connection = 'offline' 
}

document.body.ononline = function() {
   alert('You are online again');
   $scope.connection = 'online' 
}

Check the value of $scope.connection before making any requests.

Additional information for Comment1

If you want the variable to be global, assign it in a factory

myApp.factory('connectionStatus', function(){
   var connection;

   return connection;
})

Then use this factory wherever necessary. This is how you would implement it in your main controller where you define the events.

myApp.controller('mainController', function($scope, connectionStatus) {
    document.body.onoffline = function() {
           alert('You are offline now');
           connectionStatus = 'offline' 
    }
})

If the internet connection drops, I would like to show an alert notifying me about the status

Answer №1

Answer №2

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