[Fixed] "Error: No QueryClient set, use QueryClientProvider to set one" – Javascript

The Problem:

"Error: No QueryClient set, use QueryClientProvider to set one" in react query

The Solutions:

Solution 1: Use QueryClientProvider to wrap React App

The error message indicates that you need to provide a QueryClient instance to your React application. To do this, you need to wrap your entire application in a QueryClientProvider component. This is a requirement for using React Query, and it ensures that your application has access to the necessary state management functionality.

Here’s an updated version of your code with the addition of the QueryClientProvider:

import { QueryClient, QueryClientProvider, useQuery } from "react-query";

// Create a new QueryClient instance
const queryClient = new QueryClient();

export default function App() {
  return (
    // Wrap the application in QueryClientProvider, providing the queryClient instance
    <QueryClientProvider client={queryClient}>
      <Planets />
    </QueryClientProvider>
  );
}

const Planets = () => {
  const { data, status } = useQuery("Planets", fetchPlanets);
  console.log("data", data, "status", status);

  return (
    <div>
      <h2>Planets</h2>
    </div>
  );
};

By incorporating the QueryClientProvider, you establish a centralized state management system for your React Query operations. This allows your application to effectively manage data fetching, caching, and updates, thereby improving its overall performance and responsiveness.

Solution 2: Check your imports

Make sure you’re importing React Query from the correct place. It can be imported either from 'react-query' or from '@tanstack/react-query', but you should only import it from one place. If you’re importing it from both places, this can cause conflicts and lead to the error you’re seeing.

Here’s an example of how to import React Query correctly:

import React from 'react';
import { useQuery } from '@tanstack/react-query';

Or:

import React from 'react';
import { useQuery } from 'react-query';

Once you’ve corrected your imports, the error should go away.

Solution 4: Use QueryClientProvider

To resolve the error “Error: No QueryClient set, use QueryClientProvider to set one”, follow these steps:

1. Import QueryClient and QueryClientProvider:
   Add the following code to the top of your React component file, typically App.js or index.js:

   import { QueryClient, QueryClientProvider } from "react-query";

2. Create a QueryClient:
   Create a new instance of QueryClient. This object will manage the query cache and related state.

   const queryClient = new QueryClient();

3. Wrap your React application with QueryClientProvider:
   Wrap your entire React application with the QueryClientProvider component. This will make the QueryClient available to all nested components.

   ReactDOM.render(
         <QueryClientProvider client={queryClient}>
           <App />
         </QueryClientProvider>,
         document.getElementById('root')
       );

This solution sets up the necessary React Query infrastructure to handle data fetching and caching, resolving the error you were encountering.

Solution 5: Ensure the correct version of react-query-devtools is installed

The provided code appears to be using React Query version 3, which uses a different import path for the react-query-devtools package. The error message indicates that the QueryClientProvider is not set. To resolve this error, make sure you are installing and using the correct version of react-query-devtools library that is compatible with React Query version 3.

For React Query v3, the correct import path to use is:

import { ReactQueryDevtools } from 'react-query/devtools';

Make sure that you update the import statement in your code accordingly to match the version of React Query you are using.