When you display multiple notifications in a React application using Toastify, you might encounter a situation where many toasts appear at once, overwhelming users or cluttering the interface. Toastify internally manages a queue for toasts: when you trigger more notifications than the maximum allowed to display at once, the excess notifications are held in a queue. By default, Toastify shows a limited number of toasts on the screen concurrently—this is controlled by the limit property in the ToastContainer component. For example, setting limit={3} ensures that only three toasts are visible at a time, and new toasts wait in the queue until a slot opens up as previous toasts are dismissed. This mechanism helps maintain a clean, focused user experience and prevents notification overload.

Beyond simply limiting the number of concurrent notifications, you may need to control which notifications are most important or how they are dismissed. For prioritizing notifications, you can assign different types or even custom logic to determine which toasts should be shown first. For instance, you might show error notifications before informational ones by adjusting the order in which you trigger them or by dismissing lower-priority toasts when a higher-priority one arrives. Dismissing notifications programmatically is also supported: you can use Toastify's API to close a specific toast by its ID or dismiss all toasts at once. This allows you to remove outdated or irrelevant notifications, such as clearing a "Loading..." toast when an operation completes or when the user navigates away. Combining these strategies gives you fine-grained control over notification flow, ensuring users see the most relevant messages at the right time.