Loading and error states in React Native - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is a loading state in a mobile app?

A loading state shows the user that the app is busy fetching data or doing work. It usually displays a spinner or progress indicator to keep the user informed.

beginner

Why should you handle error states in your app?

Handling error states helps users understand when something went wrong and guides them on what to do next, improving user experience and app reliability.

beginner

In React Native, which component is commonly used to show a loading spinner?

The <ActivityIndicator> component is used to show a loading spinner in React Native.

beginner

How can you display an error message in React Native when data fails to load?

You can use a <Text> component to show a friendly error message and optionally a button to retry the action.

intermediate

What is a good practice when showing loading and error states on mobile?

Always keep the user informed with clear messages or indicators, and provide simple ways to retry or recover from errors.

Which React Native component shows a spinning loader?

A <ProgressBar>

B <Spinner>

C <Loader>

D <ActivityIndicator>

The component is the built-in React Native spinner.

What should you do when your app fails to load data?

A Show an error message with retry option

B Show a blank screen

C Crash the app

D Ignore the error

Showing an error message with a retry option helps users understand and fix the problem.

Why is showing a loading state important?

A To keep users informed that work is in progress

B To slow down the app

C To confuse users

D To hide errors

Loading states inform users that the app is working and prevents confusion.

Which of these is NOT a good practice for error states?

A Show clear error messages

B Provide retry options

C Show technical error codes only

D Keep the user informed

Showing only technical error codes can confuse users; friendly messages are better.

What is a simple way to implement a loading state in React Native?

A Use <Text> with 'Loading...' only

B Use <ActivityIndicator> while data loads

C Do nothing and wait silently

D Reload the app

provides a visual spinner that clearly shows loading.

Explain how you would implement loading and error states in a React Native app fetching data from the internet.

Think about showing a spinner while waiting and a message if something goes wrong.

Why is it important to handle loading and error states well in mobile apps? Give examples.

Imagine waiting for a bus without any sign if it’s coming or not.