Handling Loading and Errors Gracefully
Explore how to handle loading, error, and success states gracefully when fetching data in React. This lesson teaches you to build resilient user interfaces by declaratively managing UI transitions and providing retry options for failed requests.
Fetching data is rarely instantaneous, and users shouldn’t face an empty screen while waiting.
When a page loads data—say a list of users or orders—the worst experience is a silent, empty screen, followed by a sudden jump of content or a cryptic error. Users don’t know whether the app is working, failing, or finished. In React, we avoid that uncertainty by treating loading, error, and success as first-class UI states and rendering each path declaratively. A good React app communicates clearly: when it’s loading, when something has gone wrong, and when the data is ready.
Main concept: Declarative UI states
When working with async data, our component usually cycles through three distinct visual states:
Loading: The request is in progress.
Error: The request failed or data ...