Ensuring consistency of variables across multiple tabs using Vue.js

Question

Ensuring consistency of variables across multiple tabs using Vue.js

In my vuejs front-end, a menu is displayed only if the user is logged in. When I log out, the variable isLogged is updated to false, causing the menu to hide.

If I have multiple tabs open with the frontend (all already logged in) and I logout from one tab, the menu disappears in that tab but remains visible in all other tabs.

I have a function called checkIfIsLogged which verifies if a token is stored (indicating the user is logged in) and sets the isLogged variable to false if not. While I can use this function to maintain coherence and update the isLogged status in all tabs, what would be the best approach? Should it run periodically, only when the user interacts with the tabs, or do you have any other suggestions?

javascript vue.js

Answer 1

Answer №1

To avoid continuously checking the storage, consider adding an event listener for localStorage changes and managing them accordingly.

window.addEventListener('storage', function(event) {  
  if (event.key === 'token'&& !event.newValue) {
      console.log('Notification: Logout detected in another tab!');
      // implement post-logout actions here
  }
});

By using this method, any changes made to localStorage from a different tab will trigger this event. It's important to note that the event is only fired in tabs other than where the change occurred. Learn more about StorageEvent here.

Answer 2

To avoid continuously checking the storage, consider adding an event listener for localStorage changes and managing them accordingly.

window.addEventListener('storage', function(event) {  
  if (event.key === 'token'&& !event.newValue) {
      console.log('Notification: Logout detected in another tab!');
      // implement post-logout actions here
  }
});

By using this method, any changes made to localStorage from a different tab will trigger this event. It's important to note that the event is only fired in tabs other than where the change occurred. Learn more about StorageEvent here.

Answer 3

Answer №2

By utilizing the localStorage key, a storage event is triggered in all tabs belonging to the same domain except for the one initiating the write operation. This feature can be used to send messages across different tabs.

Below is the API reference:

https://developer.mozilla.org/en-US/docs/Web/API/Web_Storage_API/Using_the_Web_Storage_API#Responding_to_storage_changes_with_the_StorageEvent

The StorageEvent is triggered whenever there is a modification made to the Storage object (please note that this event does not apply to sessionStorage changes). It should be noted that this tactic will not function on the same page where the changes are being made — it essentially allows other pages within the same domain using the storage to synchronize any alterations made. Websites from different domains cannot access the same storage objects.

Answer 4

By utilizing the localStorage key, a storage event is triggered in all tabs belonging to the same domain except for the one initiating the write operation. This feature can be used to send messages across different tabs.

Below is the API reference:

https://developer.mozilla.org/en-US/docs/Web/API/Web_Storage_API/Using_the_Web_Storage_API#Responding_to_storage_changes_with_the_StorageEvent

The StorageEvent is triggered whenever there is a modification made to the Storage object (please note that this event does not apply to sessionStorage changes). It should be noted that this tactic will not function on the same page where the changes are being made — it essentially allows other pages within the same domain using the storage to synchronize any alterations made. Websites from different domains cannot access the same storage objects.

Ensuring consistency of variables across multiple tabs using Vue.js

Answer №1

Answer №2

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