What is the method to save data into the browser's local storage when the reload button is clicked in AngularJS?

Question

What is the method to save data into the browser's local storage when the reload button is clicked in AngularJS?

Is there a way to store data into the localstorage in AngularJS when the reload button is clicked?

I've tried using the code below, but it doesn't seem to work:

window.onbeforeunload = function (event) 
{
    var $body = angular.element(document.body);   

    var $localStorage = $body.injector().get('$localStorage');
    var logoutService = $body.injector().get('logoutService');

    if (typeof event == 'undefined') 
    {
        event = window.event;
    }

        else if (event.type == 'beforeunload') 
        {
            if(startAppCtrl.persDet !=undefined)
            {
                $localstorage.setItem('persDet',startAppCtrl.persDet);
            }else
            {
                startAppCtrl.persDet=$localStorage.getItem('persDet');   
            }        


        }
}

angularjs angular onclick local-storage

Answer 1

Answer №1

One way to handle the onbeforeunload event is by adding an event listener:

window.addEventListener('beforeunload', function(e) {
  localStorage.setItem('uniqueVarName', uniqueVarValue);
});

In the example above, we're using the localStorage property of the window object to store a value.

.controller('Ctrl', function(
    $scope,
    $window
){

  $window.addEventListener('beforeunload', function(e) {
    localStorage.setItem('uniqueVarName', uniqueVarValue);
  });

  // Remember to remove the event listener when the controller is no longer in use
  $scope.$on('$destroy', function() {
      $window.removeEventListener('beforeunload');
  });

});

If you prefer to avoid direct access to the vanilla localStorage API on the window object, you can utilize the ngStorage module:

https://github.com/gsklee/ngStorage

angular.module('app', [
            'ngStorage'
        ]).controller('Ctrl', function(
            $scope,
            $localStorage,
            $window
        ){
          ....
          $window.addEventListener('beforeunload', function(e) {
            $localStorage.setItem('uniqueVarName', uniqueVarValue);
          });
          ....
        });

Answer 2

One way to handle the onbeforeunload event is by adding an event listener:

window.addEventListener('beforeunload', function(e) {
  localStorage.setItem('uniqueVarName', uniqueVarValue);
});

In the example above, we're using the localStorage property of the window object to store a value.

.controller('Ctrl', function(
    $scope,
    $window
){

  $window.addEventListener('beforeunload', function(e) {
    localStorage.setItem('uniqueVarName', uniqueVarValue);
  });

  // Remember to remove the event listener when the controller is no longer in use
  $scope.$on('$destroy', function() {
      $window.removeEventListener('beforeunload');
  });

});

If you prefer to avoid direct access to the vanilla localStorage API on the window object, you can utilize the ngStorage module:

https://github.com/gsklee/ngStorage

angular.module('app', [
            'ngStorage'
        ]).controller('Ctrl', function(
            $scope,
            $localStorage,
            $window
        ){
          ....
          $window.addEventListener('beforeunload', function(e) {
            $localStorage.setItem('uniqueVarName', uniqueVarValue);
          });
          ....
        });

Answer 3

Answer №2

Unique Example: Utilizing $localStorage

<html>
    <head>
        <title>$localStorage Usage Example</title>
    </head>
    <body>
        <script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.1/angular.min.js"></script>
        <!-- NgStorage as a Localstorage Dependency -->
        <script type="text/javascript" src="https://cdn.jsdelivr.net/ngstorage/0.3.6/ngStorage.min.js"></script>
        <script type="text/javascript">
            //Incorporate this module into your Angular APP
            var app = angular.module('MyApp', ["ngStorage"])
            //$localStorage acts as a service 
            app.controller('MyController', function ($scope, $localStorage, $sessionStorage, $window) {
                $scope.Save = function () {
                    $localStorage.LocalMsg = "You are currently using localStorage (JEET)";
                    $sessionStorage.SessionMsg = "You are currently using session storage (JEET)";
                }
                $scope.Get = function () {
                    console.log($localStorage.LocalMsg + "\n" + $sessionStorage.SessionMsg);
                }
            });
        </script>
        <div ng-app="MyApp" ng-controller="MyController">
            <input type="button" value="Reload" ng-click="Save()" />
            <input type="button" value="Retrieve" ng-click="Get()" />
        </div>
    </body>
    </html>

Answer 4

Unique Example: Utilizing $localStorage

<html>
    <head>
        <title>$localStorage Usage Example</title>
    </head>
    <body>
        <script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.1/angular.min.js"></script>
        <!-- NgStorage as a Localstorage Dependency -->
        <script type="text/javascript" src="https://cdn.jsdelivr.net/ngstorage/0.3.6/ngStorage.min.js"></script>
        <script type="text/javascript">
            //Incorporate this module into your Angular APP
            var app = angular.module('MyApp', ["ngStorage"])
            //$localStorage acts as a service 
            app.controller('MyController', function ($scope, $localStorage, $sessionStorage, $window) {
                $scope.Save = function () {
                    $localStorage.LocalMsg = "You are currently using localStorage (JEET)";
                    $sessionStorage.SessionMsg = "You are currently using session storage (JEET)";
                }
                $scope.Get = function () {
                    console.log($localStorage.LocalMsg + "\n" + $sessionStorage.SessionMsg);
                }
            });
        </script>
        <div ng-app="MyApp" ng-controller="MyController">
            <input type="button" value="Reload" ng-click="Save()" />
            <input type="button" value="Retrieve" ng-click="Get()" />
        </div>
    </body>
    </html>

Answer 5

Answer №3

Managing local storage with AngularJS service.

Local storage management service :

A common factory service designed to store and retrieve saved data in the browser's local storage using AngularJS framework.

app.factory('storageService', ['$rootScope', function($rootScope) {

    return {
        getData: function(key) {
            return localStorage.getItem(key);
        },
        saveData: function(key, data) {
            localStorage.setItem(key, data);
        }
    };
}]);

In the controller :

Inject the storageService dependency to access and manipulate data in the local storage.

app.controller('myCtrl',['storageService',function(storageService) {

  // Save session data using storageService
  storageService.saveData('key', 'value');

  // Retrieve saved session data using storageService
  var localStorageData = storageService.getData('key');

});

Answer 6

Managing local storage with AngularJS service.

Local storage management service :

A common factory service designed to store and retrieve saved data in the browser's local storage using AngularJS framework.

app.factory('storageService', ['$rootScope', function($rootScope) {

    return {
        getData: function(key) {
            return localStorage.getItem(key);
        },
        saveData: function(key, data) {
            localStorage.setItem(key, data);
        }
    };
}]);

In the controller :

Inject the storageService dependency to access and manipulate data in the local storage.

app.controller('myCtrl',['storageService',function(storageService) {

  // Save session data using storageService
  storageService.saveData('key', 'value');

  // Retrieve saved session data using storageService
  var localStorageData = storageService.getData('key');

});

Answer 7

Answer №4

The LocalStorage API provides front-end web developers with a convenient way to store and retrieve data on a user's device.

There are multiple methods available for setting and retrieving values from the local storage.

Here is an example of how to store values in the local storage:

// Using functions
localStorage.setItem('name', 'Matt West');

// Using object property
localStorage.name = 'Matt West';

// Using array notation
localStorage['name'] = 'Matt West';

To retrieve the stored values, you can use the following code:

var name = localStorage.getItem('name');

Answer 8

The LocalStorage API provides front-end web developers with a convenient way to store and retrieve data on a user's device.

There are multiple methods available for setting and retrieving values from the local storage.

Here is an example of how to store values in the local storage:

// Using functions
localStorage.setItem('name', 'Matt West');

// Using object property
localStorage.name = 'Matt West';

// Using array notation
localStorage['name'] = 'Matt West';

To retrieve the stored values, you can use the following code:

var name = localStorage.getItem('name');

Answer 9

Answer №5

Create a custom object that handles saving and retrieving tasks.

//Task persistence using localStorage
var STORAGE_KEY = "tasks";
//localStorage.clear();
var taskStorage = {
  fetch: function() {
    var savedTasks = localStorage.getItem(STORAGE_KEY);
    var tasks = savedTasks !== null 
      ? JSON.parse(savedTasks)
      : [
          {
            name: "Complete project",
            priority: "High"
          },
          {
            name: "Send email",
            priority: "Medium"
          }
        ];
    tasks.forEach(function(task, index) {
      task.id = index;
    });
    taskStorage.uid = tasks.length;
    return tasks;
  },
  save: function(tasks) {
    localStorage.setItem(STORAGE_KEY, JSON.stringify(tasks));
  }
};

Call this method when the component is being destroyed. You can also use $routeChangeStart event for single page applications (SPA).

$scope.$on('$routeChangeStart', function() {
    //callback logic here
});

Answer 10

Create a custom object that handles saving and retrieving tasks.

//Task persistence using localStorage
var STORAGE_KEY = "tasks";
//localStorage.clear();
var taskStorage = {
  fetch: function() {
    var savedTasks = localStorage.getItem(STORAGE_KEY);
    var tasks = savedTasks !== null 
      ? JSON.parse(savedTasks)
      : [
          {
            name: "Complete project",
            priority: "High"
          },
          {
            name: "Send email",
            priority: "Medium"
          }
        ];
    tasks.forEach(function(task, index) {
      task.id = index;
    });
    taskStorage.uid = tasks.length;
    return tasks;
  },
  save: function(tasks) {
    localStorage.setItem(STORAGE_KEY, JSON.stringify(tasks));
  }
};

Call this method when the component is being destroyed. You can also use $routeChangeStart event for single page applications (SPA).

$scope.$on('$routeChangeStart', function() {
    //callback logic here
});

What is the method to save data into the browser's local storage when the reload button is clicked in AngularJS?

Answer №1

Answer №2

Unique Example: Utilizing $localStorage

Answer №3

Answer №4

Answer №5

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