What are the best practices for using the Context API in TypeScript?

What are the best practices for using the Context API in TypeScript?

When using the Context API in TypeScript, it's important to define your context types clearly. This helps with type safety.

Can you give me an example of how to create a context in TypeScript?

Sure! You can create a context like this:

import React, { createContext, useContext } from 'react';

interface MyContextType {
  value: string;
  updateValue: (newValue: string) => void;
}

const MyContext = createContext<MyContextType | undefined>(undefined);

export const MyProvider: React.FC = ({ children }) => {
  const [value, setValue] = React.useState('');

  const updateValue = (newValue: string) => setValue(newValue);

  return (
    <MyContext.Provider value={{ value, updateValue }}>
      {children}
    </MyContext.Provider>
  );
};

export const useMyContext = () => {
  const context = useContext(MyContext);
  if (!context) {
    throw new Error('useMyContext must be used within a MyProvider');
  }
  return context;
};

This sets up a context with a value and a function to update that value.

What should I avoid when using the Context API?

Avoid placing too much data in the context, as it can lead to performance issues. Instead, keep the context focused on specific data that needs to be shared.