Quick Fix: Consider wrapping the stateful component in a React memo() to preserve component state across HMR updates. Alternatively, modify the code to check if the data object is not null before destructuring.
The Problem:
A multistep form using dynamically imported components in Vite with React and TypeScript experiences fast refresh failure, resulting in an error message indicating that the currentStep property of the data object is null. Despite exploration of various solutions, the issue persists, suggesting that the Hot Module Replacement (HMR) process may be causing the entire page to reload instead of just the affected component, leading to the loss of internal state.
The Solutions:
Solution 1: Use React memo()
Wrap the stateful component in a React memo() to preserve its state across HMR updates. For example, you can wrap the useApp hook in a useMemo hook to ensure it’s only called once:
const data = useMemo(() => useApp(), []);
Solution 2: Handle null values explicitly
Modify your code to handle the case where the data object is null:
This will ensure that the destructuring operation only occurs if the data object is not null.
Q&A
How to fix fast refresh failing when dynamically importing components in Vite using React and Typescript?
—
Try to wrap the stateful component in a React memo() or If the data object is null, modify the code to only destructure when it’s not null.
What seems to be the issue when getting the following error: TypeError: Cannot destructure property ‘currentStep’ of ‘data’ as it is null.
—
The issue might be that your state is getting lost when you update the component (likely because the useApp() hook is returning null before the data is ready).
Video Explanation:
The following video, titled "How To Create An Advanced Shopping Cart With React and ...", provides additional insights and in-depth exploration related to the topics discussed in this post.
... Component 56:45 - useLocalStorage Hook #TypeScript #WDS #React. ... using React, TypeScript, and Bootstrap. This is a great intermediate level ...
