Dynamic import faliure#214
Conversation
|
@krishnnag998-del is attempting to deploy a commit to the hrx01-dev's projects Team on Vercel. A member of the Team first needs to authorize it. |
📝 WalkthroughWalkthroughUpdates the ChangesDynamic import recovery
Sequence Diagram(s)sequenceDiagram
participant Browser
participant App.lazy
participant sessionStorage
participant window.location
participant GlobalErrorBoundary
Browser->>App.lazy: request lazy route module
App.lazy->>sessionStorage: read page-has-been-force-refreshed
App.lazy->>window.location: reload() on first import failure
Browser->>GlobalErrorBoundary: render route error UI
GlobalErrorBoundary->>window.location: reload() from Refresh Page
Estimated code review effort🎯 3 (Moderate) | ⏱️ ~25 minutes Possibly related PRs
Suggested labels
Suggested reviewers
Poem
🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
✨ Finishing Touches🧪 Generate unit tests (beta)
Comment |
![coderabbitai[bot]](https://avatars.githubusercontent.com/in/347564?s=60&v=4){kind=small}
There was a problem hiding this comment.
Actionable comments posted: 2
🤖 Prompt for all review comments with AI agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.
Inline comments:
In `@src/app/App.tsx`:
- Around line 16-22: The lazy import retry flag is being cleared too early in
the successful import path inside App.tsx’s lazy-loading/retry logic, which can
re-enable reloads for later failing chunks during the same session. Update the
retry guard around the import handling so the sessionStorage flag is not reset
from arbitrary successful lazy imports; instead, scope the one-shot state to the
specific route/import in App.tsx and only clear it after that route has fully
recovered, preserving the existing retry behavior and allowing persistent
failures to reach GlobalErrorBoundary.
In `@src/app/components/GlobalErrorBoundary.tsx`:
- Around line 5-8: The chunk-load detection in GlobalErrorBoundary is missing
Firefox’s dynamic import failure message, so stale chunk errors can fall through
to the generic UI. Update the isChunkError check to also recognize the Firefox
variant “error loading dynamically imported module” alongside the existing
Error.message matches, keeping the logic in GlobalErrorBoundary consistent for
all browsers.
🪄 Autofix (Beta)
Fix all unresolved CodeRabbit comments on this PR:
- Push a commit to this branch (recommended)
- Create a new PR with the fixes
ℹ️ Review info
⚙️ Run configuration
Configuration used: defaults
Review profile: CHILL
Plan: Pro Plus
Run ID: a2ced22c-6c1d-4182-8fc8-f488aca11b7a
📒 Files selected for processing (3)
firebase.jsonsrc/app/App.tsxsrc/app/components/GlobalErrorBoundary.tsx
| window.sessionStorage.setItem("page-has-been-force-refreshed", "false"); | ||
| return component; | ||
| } catch (error) { | ||
| if (!pageHasAlreadyBeenForceRefreshed) { | ||
| window.sessionStorage.setItem("page-has-been-force-refreshed", "true"); | ||
| window.location.reload(); | ||
| return new Promise<{ default: T }>(() => {}); |
There was a problem hiding this comment.
🩺 Stability & Availability | 🟠 Major | ⚡ Quick win
Don’t clear the global retry flag from any successful lazy import.
Line 16 can reset the one-shot guard before a later lazy route chunk fails during the same page load, especially in nested routes. If the failing chunk is still unavailable, this can repeat reloads instead of reaching GlobalErrorBoundary. Scope the flag per import/route or clear it only after the route has fully recovered, not from arbitrary successful imports.
🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.
In `@src/app/App.tsx` around lines 16 - 22, The lazy import retry flag is being
cleared too early in the successful import path inside App.tsx’s
lazy-loading/retry logic, which can re-enable reloads for later failing chunks
during the same session. Update the retry guard around the import handling so
the sessionStorage flag is not reset from arbitrary successful lazy imports;
instead, scope the one-shot state to the specific route/import in App.tsx and
only clear it after that route has fully recovered, preserving the existing
retry behavior and allowing persistent failures to reach GlobalErrorBoundary.
| const isChunkError = | ||
| error instanceof Error && | ||
| (error.message.includes("Failed to fetch dynamically imported module") || | ||
| error.message.includes("Importing a module script failed")); |
There was a problem hiding this comment.
🎯 Functional Correctness | 🟡 Minor | ⚡ Quick win
🧩 Analysis chain
🏁 Script executed:
#!/bin/bash
# Description: Find other dynamic-import/chunk-load detection logic or tests to align the supported message list.
rg -n -C3 'Failed to fetch dynamically imported module|Importing a module script failed|Loading chunk|dynamically imported module|ChunkLoadError|chunk' .Repository: hrx01-dev/Servio
Length of output: 3440
🌐 Web query:
Firefox dynamic import failure message "error loading dynamically imported module" chunk load
💡 Result:
The Firefox error message "TypeError: error loading dynamically imported module" is a generic failure state for dynamic import expressions that do not throw a more specific JavaScript exception [1][2]. Because it is a catch-all notification, its causes are diverse. Common scenarios include: 1. Stale Cache and Deployment Mismatches: In modern frontend frameworks (like Vite or Webpack), dynamic imports often rely on hashed filenames (e.g., chunk.abc123.js). If a user has a cached version of the main application that references a chunk file that has been removed or renamed after a new deployment, the browser will attempt to fetch a non-existent file, resulting in this error [3][4][5]. 2. Network and Cache Issues: Users may experience intermittent failures where a specific chunk fails to load despite the network request appearing to succeed or failing with status code 0 (often indicating a cache-related issue or network interruption) [6]. Clearing the browser cache is a frequently reported temporary workaround for these cases [6]. 3. Security and Environment Restrictions: Dynamic imports may fail in certain constrained environments, such as within specific types of iframes or when attempted within Firefox web extension content scripts, which have different execution contexts than standard web pages [2][7]. 4. Browser-Specific Handling: While other browsers may produce different, more descriptive error messages (such as 404s or specific network errors), Firefox consistently reports these failures under this specific TypeError [1][4]. Troubleshooting Steps: - Verify Deployment Integrity: Ensure your deployment process does not invalidate active user sessions by removing chunk files before clients have finished their current session. - Implement Retry Logic: Since these errors are often transient (network drops or race conditions), many developers implement a wrapper around their dynamic imports to retry the fetch if it fails [4]. - Check for Caching Policies: Review your server's Cache-Control headers to ensure that entry point files (like index.html) are not cached aggressively, which prevents users from receiving the updated references to new chunk filenames [6]. - Review Extension/Sandbox Contexts: If this occurs in an extension, ensure that any dynamic loading is performed in the background script rather than directly in content scripts, which may not support module loading [7].
Citations:
- 1: Dynamic projector plugin does not load in Firefox tensorflow/tensorboard#2536
- 2: https://bugzilla.mozilla.org/show_bug.cgi?id=1573262
- 3: TypeError: Failed to fetch dynamically imported module vitejs/vite#11804
- 4: https://stackoverflow.com/questions/72376333/failed-to-fetch-dynamically-imported-module
- 5: TypeError: Failed to fetch dynamically imported module vitejs/vite#11804
- 6: https://bugzilla.mozilla.org/show_bug.cgi?id=1970910
- 7: https://discourse.mozilla.org/t/error-loading-dynamically-imported-module-when-using-rollup/138312
Broaden chunk-load detection for Firefox
Firefox can surface dynamic-import failures as TypeError: error loading dynamically imported module, which would still fall back to the generic error UI here. Add that variant so stale chunks consistently hit the recovery screen.
🤖 Prompt for AI Agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.
In `@src/app/components/GlobalErrorBoundary.tsx` around lines 5 - 8, The
chunk-load detection in GlobalErrorBoundary is missing Firefox’s dynamic import
failure message, so stale chunk errors can fall through to the generic UI.
Update the isChunkError check to also recognize the Firefox variant “error
loading dynamically imported module” alongside the existing Error.message
matches, keeping the logic in GlobalErrorBoundary consistent for all browsers.
2 participants
##description
Here is a short, easy summary of the changes I made to fix the application crashing:
to load an outdated page chunk that was deleted during a new deployment, the app will automatically and silently refresh
the page to fetch the new version, avoiding a crash.
internet connection), the app will no longer crash into a blank screen. Instead, it displays a polite "App Updated" message
with a clickable Refresh Page button.
html . This ensures users always get the freshest version of the site immediately after you deploy, rather than a stale
version looking for deleted files.
TypeScript rule ( any to unknown ) so that your code fully passes npm run lint and typecheck again.
closes Fix Dynamic Import Failures Across All Lazy-Loaded Routes in Production #205
Summary by CodeRabbit
New Features
Bug Fixes