Tips for updating components with fresh data in Next.JS without having to refresh the page

As part of my Todo-App development project, I am utilizing technologies such as Next.JS, Prisma, Typescript, and PostgreSQL. The data retrieval process involves the API folder interacting with the database through Prisma. CRUD operations on the Task table are performed by calling the endpoint http:3000/api/tasks. The rendering of tasks is handled by a component named To-dos, which fetches the tasks using a useEffect.

While everything seems to be functioning correctly, I have encountered an issue where changes in the data due to CRUD operations do not reflect on the Client-Side without a manual page reload. Is there a way to resolve this issue?

Todos.tsx :


    // Implementation of Todos component
    export default function Todos({ attribute, value, title, limit, addBtn }: arguments) {
      const [data, setData] = useState<Item[]>([]);

      // Fetching data
      useEffect(() => {
        const fetchData = async () => {
          const response: any = await obtainTasks({ attribute, value, limit });
          setData(response.response);
        };

        fetchData();
      }, []);
      
      // Component rendering logic goes here...
    }
  

I have experimented with using Polling intervals for fetching data every 5 seconds, but it proves to be costly. My primary goal is to have the data updated seamlessly without necessitating a full page reload.

Answer №1

When the state or prop changes, react components will rerender.

If you utilize useEffect, its effect will run again if any of its dependencies change. Since the dependency array of useEffect is empty, it means the effect will only run when the component initially renders. To trigger a rerun of the useEffect effect, you must include a dependency that could potentially change. This usually involves the data state value in your application. However, be cautious as adding data to the dependency array can lead to an infinite loop. If the data state value changes, it triggers a rerender of the app, which in turn causes the useEffect to depend on data and rerun indefinitely. The following setup should resolve this issue:

    useEffect(() => {
     const fetchData = async () => {
       const response: any = await obtenerTasks({ attribute, value, limit });
       setData(response.response);
     };

     fetchData();
  // These are props values used within `obtenerTasks`
  // When they change, this useEffect will rerun 
  }, [attribute, value, limit]);

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