A component suspended while responding to synchronous input. This will cause the UI to be replaced with a loading indicator. To fix, updates that suspend should be wrapped with startTransition. Error: A component suspended while responding to synchronous input. This will cause the UI to be replaced with a loading indicator. To fix, updates that …

Suspense.js

startTransition:

1. startTransition is a function in React that is used when you're about to update a particular state and its impact shouldn't heavily affect the UI.
2. Its primary purpose is to ensure that if you're running a long-running process, the user doesn't face significant delays in the UI.
3. It allows React to defer the update, making it non-blocking for the user interface.



Suspense:

1. Suspense is a React component used to handle loading data or components.
2. It works at the time when your application code is being loaded and you need to show a "fallback" UI to the user.
3. If a specific component or data is being loaded and it will take some time to complete, Suspense displays a fallback UI, indicating to the user that they need to wait.




import { useEffect, useState, lazy, startTransition, Suspense } from "react";
 useEffect(() => {
    const fetchPayoutSlab = async () => {
      const token = sessionStorage.getItem("token");
      if (!token) {
        toast.error("Not Authorized yet.. Try again! ");
        return;
      }

      try {
        const response = await axios.get(`${VITE_DATA}/lab/view`, {
          headers: { Authorization: `${token}` },
        });
//         SET TRANSITION CALLBACK TO 
        startTransition(() => {
          setPayoutSlab(response.data);
        });
      } catch (error) {
        console.error("Error fetching payout slab", error);
      }
    };

 <Suspense fallback={<div>Loading...</div>}>
              <FaRegCircleDown size={20} />
            </Suspense>