Issue Review: cloudflare/workers-sdk#9882

Summary

Cannot test cron triggers locally when using Workers with assets or the Vite plugin with redirected config.

Findings

• Created: 2025-07-08
• Updated: 2025-12-05
• Version: wrangler 4.24.0 → 4.61.0
• Component: wrangler, vite-plugin, miniflare
• Labels: bug, Workers + Assets
• Comments: 5

Key Evidence

• User followed docs to set up cron triggers with Vite+React project
• Both /cdn-cgi/handler/scheduled and /__scheduled endpoints fail
• Maintainer @emily-shen identified 2-3 separate bugs:
  1. /cdn-cgi/handler/scheduled broken for assets - miniflare tries to call scheduled handler on asset proxy worker instead of user worker
  2. /__scheduled with --test-scheduled broken for vite apps with redirected config - vite doesn't bundle the middleware that simulates scheduled handler
  3. SPA not_found_handling causes /__scheduled browser requests to fallback to index.html (curl works)
• Multiple workarounds documented by users:
  • Build with wrangler first, use separate config for cron testing
  • Add custom route handler to trigger cron logic
  • Configure run_worker_first in assets binding

Recommendation

Status: KEEP OPEN

Reasoning: Multiple bugs identified by maintainer affecting cron trigger testing with assets and Vite plugin. Workarounds exist but are complex. These are real functionality gaps that block local testing of cron triggers in modern setups.

Action: Fix the three identified bugs:

1. Fix miniflare to call scheduled handler on correct worker when assets are involved
2. Fix vite plugin to bundle scheduled handler middleware
3. Document or fix SPA fallback behavior for special endpoints

Suggested Comment

N/A - Maintainer already provided detailed analysis and workarounds.