Fast Refresh
Fast Refresh is a feature that allows you to get instant feedback on your edits to React components. It works by preserving the component state and only updating the parts of the UI that have changed. This results in a faster development experience and improved productivity.
Instant Feedback
UI updates in real-time as you save your changes
Preserved Component State
Maintains inputs and scroll position during updates
Improved Developer Productivity
Faster development cycles and reduced waiting time
Fast Refresh uses a combination of techniques to achieve its speed and efficiency. It leverages React's component tree structure to identify the minimal set of updates required. It also uses a caching mechanism to avoid unnecessary re-renders. Here's a simplified overview:
When you save a file, Fast Refresh analyzes the changes and determines which components need to be updated. It then sends a signal to the browser to re-render those components. The browser applies the updates without reloading the entire page, preserving the state of other components.
Fast Refresh is enabled by default in new Acme Co projects. If you're using an older version, you can enable it by following the instructions in our documentation. Ensure you have the latest version of React and Acme Co installed to take full advantage of Fast Refresh.