React 18: implementing Dynamic Imports and Suspense in a Complex Component Tree
I'm writing unit tests and I've tried everything I can think of but I've hit a wall trying to I've been banging my head against this for hours..... I've been struggling with this for a few days now and could really use some help. I'm working with React 18 and trying to implement dynamic imports for code splitting using `React.lazy` and `Suspense`. My component tree has nested routes, and I'm working with an scenario where the fallback UI is not rendering as expected while loading the components. Specifically, I have a main component that uses `React.lazy` to import a child component like so: ```javascript const LazyChild = React.lazy(() => import('./LazyChild')); ``` In my main component, I'm wrapping `LazyChild` in a `Suspense` component: ```javascript <Suspense fallback={<div>Loading...</div>}> <LazyChild /> </Suspense> ``` However, when I navigate to the route that renders `LazyChild`, the fallback is displayed for a split second before showing a blank screen. I've checked the network tab, and the child component appears to load successfully, but it seems like there's a rendering scenario when the component is supposed to mount. I've also tried using `React.Profiler` to track component render timings, and it shows that `LazyChild` is being rendered but immediately unmounted. This behavior is inconsistent: sometimes it works as expected, and other times it fails to render properly. I'm using React Router v6 for my routing setup, and I suspect there might be a conflict with how routes are defined. Here’s a snippet of my route configuration: ```javascript <Routes> <Route path="/" element={<Home />} /> <Route path="/lazy" element={<LazyComponent />} /> </Routes> ``` I've tried moving the `Suspense` component higher up in the tree and simplifying my route configuration, but the question continues. Has anyone encountered similar issues with dynamic imports in a nested routing context? Any insights on resolving this would be greatly appreciated! This is my first time working with Javascript 3.9. This is my first time working with Javascript 3.11. I'd be grateful for any help. I'm on Windows 10 using the latest version of Javascript. I'm open to any suggestions. Is there a simpler solution I'm overlooking?