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Mastering React Suspense and Freeze for a Seamless User Experience

What is React Suspense?

React Suspense is an experimental feature that allows you to suspend rendering until all the necessary data is available. This means that instead of displaying a blank page or a loading indicator, you can display a fallback UI that provides a better user experience.

import { Suspense } from 'react';

function ProfileDetails() {
  // Fetch data from API
  const data = fetch('https://api.example.com/profile');

  return (
    Loading profile...}>

    
  );
}

What is React Freeze?

React Freeze is a library that builds upon the concepts of React Suspense. It allows you to freeze the rendering of a component until a certain condition is met.

import { Freeze } from 'react-freeze';

function ProfileDetails() {
  const [data, setData] = useState(null);

  useEffect(() => {
    fetch('undefinedapi.example.com/profile')
      .then(response => response.json())
      .then(data => setData(data));
  }, []);

  return (

    
  );
}

Using React Freeze with React Native

React Freeze can also be used with React Native to control the rendering of components in mobile applications.

import { Freeze } from 'react-freeze/native';

function ProfileScreen() {
  const [data, setData] = useState(null);

  useEffect(() => {
    fetch('undefinedapi.example.com/profile')
      .then(response => response.json())
      .then(data => setData(data));
  }, []);

  return (
    
      
        {data.name}
        {data.description}
      
    
  );
}

Visualizing React Suspense and Freeze

To visualize the behavior of React Suspense and Freeze, you can use the Chrome DevTools.

• Open the Chrome DevTools by pressing F12 or Cmd + Opt + I on Mac.
• Select the Elements tab.
• Click on the Rendering tab.
• Select the Paint flashing option.

This will highlight the areas of the page that are being re-rendered.

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