Fix Next.JS className Error Easily | Use useContext!

Yes, you can set the className dynamically using React’s Context API with useContext in a Next.js application. However, it’s important to ensure that the value provided by useContext remains consistent across renders to avoid triggering React’s reconciliation process and the warning “Prop className did not match.” This warning typically occurs when the className prop changes between renders, but the component’s key props remain the same.

To avoid this warning, you can follow these steps:

1. Define the Context:
   First, define your context and provide its value using a Context Provider. Ensure that the value provided by the context remains consistent across renders.
2. Access the Context Value:
   Use the useContext hook within your components to access the context value.
3. Set className Dynamically:
   Inside your component, set the className dynamically based on the context value.

Here’s a basic example of how you can achieve this:

import React, { useContext } from 'react';

// 1. Define your context
const MyContext = React.createContext('defaultClassName');

// 2. Create a Provider component
const MyProvider = ({ children }) => {
  const value = 'dynamicClassName'; // Set your dynamic className here
  return <MyContext.Provider value={value}>{children}</MyContext.Provider>;
};

// 3. Use the context within your components
const MyComponent = () => {
  const dynamicClassName = useContext(MyContext);
  return <div className={dynamicClassName}>Hello, World!</div>;
};

// Example usage of the Provider
const MyApp = () => {
  return (
    <MyProvider>
      <MyComponent />
    </MyProvider>
  );
};

export default MyApp;

In this example, the className is set dynamically based on the value provided by the MyContext context. Ensure that the value provided by MyContext remains consistent across renders to avoid the warning “Prop className did not match.” If the className needs to change dynamically based on some state or props, make sure that the changes are properly handled to avoid inconsistencies between renders.