Facilitating secure API responses with dynamic CSS for token expiration notifications
I'm a bit lost with I'm migrating some code and Building an application that requires a secure user experience, I've integrated REST endpoints to manage token-based authentication... However, I'm looking to implement a CSS solution that dynamically displays notifications when a user's session token is about to expire. The goal is to catch the user’s attention without compromising the overall UI aesthetics. Currently, I have a notification div that I show based on a JavaScript timer that checks the token expiration. Here’s a snippet of my existing CSS for the notification: ```css .notification { display: none; position: fixed; top: 20px; right: 20px; padding: 15px; background-color: #ffcc00; color: #000; border-radius: 5px; transition: opacity 0.5s ease-in-out; } ``` This works for basic notifications, but I want to ensure that the notification is visually distinct when the token is about to expire—ideally, a flashing effect or color change would suffice. I thought about using CSS animations, but I’m concerned about performance impacts, especially since I also have a heavy load of API calls happening simultaneously. Here’s an example of how I tried to implement a flashing effect: ```css @keyframes flash { 0% { background-color: #ffcc00; } 50% { background-color: #ff6666; } 100% { background-color: #ffcc00; } } .notification.expiring { animation: flash 1s infinite; } ``` I applied the `expiring` class dynamically when the token reaches a 5-minute expiration mark, but it doesn’t seem to trigger consistently across different browsers. I want to understand how I can enhance this implementation to ensure reliability and performance across environments. Additionally, are there best practices for notifying users of token expirations without detracting from their experience? Any insights on how to balance effective notifications with CSS performance would be greatly appreciated. For the JavaScript part, I’m currently using: ```javascript setInterval(() => { if (checkTokenExpiration()) { document.querySelector('.notification').classList.add('expiring'); document.querySelector('.notification').style.display = 'block'; } }, 60000); ``` Am I missing something in my approach, or is there a more efficient way to handle this? This is for a mobile app running on Windows 11. Any examples would be super helpful. I'm using Javascript 3.11 in this project. Any examples would be super helpful.