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Graph/fast-refresh-hot-reload-regression

Pattern

Hot Reload Regression

fast-refresh-hot-reload-regression

A recurring hot-reload/build slowdown where Next.js Fast Refresh falls back to full reloads or compilation stalls, driven by component export mismatches (identifier casing) and external file watchers/antivirus scanning interference.

Node Details

Public graph metadata

Updated4/30/2026

Connections

30 linked nodes

Resend emails do not send when Next.js is built with output: "export"

React app loading state behaves unpredictably because useEffect runs twice in Strict Mode

React context data loaded from localStorage in a Next.js app either requires disabling SSR to avoid hydration mismatches, or causes significant delayed hydration/content layout shift compared to other client components.

After migrating to React 18, dynamically importing a language-specific component with React.lazy based on a zustand state variable causes the component to infinitely render/loading.

Hot reloading (Fast Refresh) and initial compilation became extremely slow after adding shadcn components and react-icons to a Next.js 14 + Tailwind project.

NestJS hot reload does not pick up changes in referenced workspace packages

Installation/build fails in a Next.js/React app with an error involving missing module 'react-dom/server.browser', alongside a runtime ReferenceError for `userouter` in `pages/login.js`.

Error occurred prerendering page "/post/1" — I'm trying to deploy a blog written with Next.js v15.3.3 with Vercel. Tension: TypeError: Cannot read properties of null (reading 'useState'). Outcome: Export encountered an error on /post/[slug]/page: /post/1, exiting the build.

Next.js 15 Image component is not loading from the local host but it is working in Vercel — In my code Next.js 15 Image component. Tension: The image URL also working and I have done the necessary configuration in the next.js config file. Outcome: Disable image optimization temporarily by using the unoptimized attribute.

In a Next.js static build using `generateStaticParams`, an expensive async operation (e.g., Firestore fetch) wrapped with React `cache` is executed multiple times per `id` during `npm run build`. The expected behavior is that it runs exactly once per `id` across all page builds, including where it’s called for metadata.

In the Next.js app, the `wordGroups` state update works in `npm run dev` but does not trigger in production after `npm run build` and `npm run start`, so dependent `useEffect` hooks never run.

The browser shows a 'Module not found: react-refresh/runtime.js' error when running npm start, indicating the import path is being blocked as outside the project's src directory.

modules do run multiple times when imported in a Next.js application — in a Next.js application. Tension: No, imports do not only run once when the site is built, and never again. Outcome: At least every time a user lands on your website, an import happens client-side.

Some Next.js Link components started performing full page reloads only on the deployed Vercel site, while the same Links worked client-side locally and on other pages.

Running `eslint .` in a Next.js 16 app crashed immediately — The eslint.config.mjs used the long-standard Next.js pattern: `new FlatCompat({ baseDirectory })` + `compat.extends('next/core-web-vitals', 'next/typescript')`. Tension: The crash had been invisible in CI because the lint step had `continue-on-error: true`. Outcome: The job reported green while lint hadn't run for weeks.

Sentry reports runtime errors: “Cannot read property 'getReadModeConfig/Extract/Render' of undefined”, which trigger Next.js error handling and break the site during static page rendering.

work perfectly fine on my local machine but fail consistently when executed in GitHub Actions — My setup involves a Next.js 14 app using the App Router, TypeScript, Playwright for testing, and GitHub Actions for CI. Outcome: download an HTML report saved in the last step in your CI.

After resuming the Vite/React project, the site stopped working: it shows a blank white page with infinite loading and Vite auto-refresh/no hot reload doesn’t work. Removing a newly added large `scene.glb` file makes the site load correctly.

Using `react-pdf` with Next.js 14.2 fails at runtime with an error stating that the `react-pdf.js` require in the server bundle must be changed to a dynamic `import()`. The app cannot load `@react-pdf/renderer` in the current build setup.

I have to rebuild each time to change the data — I use NextJS and I'm trying to make a static site with Wordpress as a backend. Tension: I don't want to use `useEffect` because it's not great for SEO, and I can't use `getStaticProps` with a NextJS 14 app. Outcome: I would like my page to fetch by refreshing the deployed site in the correct way without affecting SEO or performance.

when `npm run build` is called that things blow up — If I touch the db anywhere, then the error is thrown on `npm run build`. Tension: This makes me think that I am misunderstanding the `app router` in nextjs and its an architecture issue with my method of implementing `sequelize-typescript`? Outcome: The problem lies in the minified version of your code.

the console is filled with: — I have an existing next.js codebase with multiple bugs that need fixing. Tension: Support for defaultProps will be removed from function components in a future major release. Outcome: How can I fix or suppress the warnings so I can read the console?

Running an old React app on Node.js >18 fails during `npm start` with an error related to webpack/OpenSSL compatibility, and the environment variable `SKIP_FLIGHT_CHECK` plus OpenSSL legacy provider workaround is being considered.

React loaded via an import map works on first page load but fails after a reload, causing 'Uncaught TypeError: Failed to resolve module specifier "react"'. Network shows module scripts are not fetched, and Firefox is also broken with little/no usable error.

React Router navigation/refresh triggers a 'change in order of Hooks' error in Account.jsx. This happens because the component sometimes returns early before calling hooks.

Browser keeps serving a previous deployed version until users hard refresh

Using `unstable_cache` in a Next.js server component doesn’t cache results during local development; the fetch function runs and logs on every request, adding ~1s latency despite `revalidate` being set to 10 seconds.

After editing the source code, I manually run "Run Java", which recompiles the Java code — editing the source code of a Spring Boot container (created using Docker Compose) from within a DevContainer. Tension: Is there a way to automate this process so that Java is recompiled and the app is reloaded automatically whenever I make changes to the source code? Outcome: hot reload started working correctly.

developers don't know what state survives a hotload, what gets reset, and how to write hotload-safe code — In s&box, hotloading (live code reload without restarting the game) works automatically during development. Tension: Static fields survive hotloads but component state is re-initialized.

Dev hot-reload silently stops working — Next.js (App Router) and a WebSocket server in the same Node process. Outcome: In production it doesn't matter because there's no HMR, but the dev experience is broken.

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