React - Login screen flashes on Loading

React – Login screen flashes on Loading

If you have ever encountered a situation where your login screen briefly flashes before the loading process completes in a React application, you are not alone. This issue is quite common and can be quite frustrating for both developers and users. Fortunately, there are a few solutions to mitigate this problem.

Solution 1: Use Conditional Rendering

One way to prevent the login screen from flashing is to use conditional rendering. By conditionally rendering the login screen based on the loading state, you can ensure that it only appears once the loading process is complete.

{`
import React, { useState, useEffect } from 'react';

const LoginScreen = () => {
  const [isLoading, setIsLoading] = useState(true);

  useEffect(() => {
    // Simulate loading process
    setTimeout(() => {
      setIsLoading(false);
    }, 2000);
  }, []);

  return (
    {isLoading ?  : }
  );
};

export default LoginScreen;
`}

In the above code snippet, we use the useState and useEffect hooks from React to manage the loading state. We simulate the loading process using a setTimeout function and update the loading state to false once it completes. The login screen is conditionally rendered based on the loading state.

Solution 2: Use CSS Transitions

Another approach is to use CSS transitions to fade in the login screen once the loading process is finished. By applying a fade-in animation, we can smoothly transition from the loading screen to the login screen.

{`
import React, { useState, useEffect } from 'react';
import './LoginScreen.css';

const LoginScreen = () => {
  const [isLoading, setIsLoading] = useState(true);

  useEffect(() => {
    // Simulate loading process
    setTimeout(() => {
      setIsLoading(false);
    }, 2000);
  }, []);

  return (
    
      {isLoading ?  : }
    
  );
};

export default LoginScreen;
`}

In the above code snippet, we add a CSS class to the container div based on the loading state. The ‘loading’ class applies a fade-out animation to the loading screen, while the ‘login’ class applies a fade-in animation to the login screen. By using CSS transitions, we can achieve a smooth transition between the two screens.

Solution 3: Use React Suspense

If you are using React version 16.6 or above, you can take advantage of React Suspense to handle the loading state and prevent the login screen from flashing.

{`
import React, { Suspense } from 'react';

const LoginScreen = () => {
  return (
    }>
      
    
  );
};

export default LoginScreen;
`}

In the above code snippet, we wrap the LoginForm component with the Suspense component and provide a fallback prop, which is displayed while the LoginForm is loading. React Suspense automatically handles the loading state and ensures that the fallback component is displayed until the LoginForm is ready.
By implementing one of these solutions, you can effectively prevent the login screen from flashing during the loading process in your React application. Choose the solution that best fits your project requirements and enjoy a smoother user experience.

React – Login screen flashes on Loading