React strict mode explained

“Strict mode” is a feature in React that enables additional checks and warnings for components. Strict mode is designed to help developers find potential problems in their code, such as side effects in lifecycle methods or the use of deprecated APIs.

To use strict mode in React, you can wrap your root component with the <React.StrictMode> component. This will enable strict mode checks and warnings for the entire component tree.

Here’s an example of how you might use strict mode in a React application:

import React from 'react';
import ReactDOM from 'react-dom';

function App() {
  return <div>Hello, world!</div>;
}

ReactDOM.render(
  <React.StrictMode>
    <App />
  </React.StrictMode>,
  document.getElementById('root')
);

In this example, the <React.StrictMode> component is used to enable strict mode for the entire component tree. This will cause React to perform additional checks and show warnings for any potential problems that are found.

It’s important to note that strict mode is intended for development and testing, and it is not recommended to use strict mode in production applications. Strict mode can have a negative impact on performance, and it is not intended to fix or prevent errors in production code.