feat(workers): add defineWorkerFetch and waitUntil for async drains

[HugoRCD]

🔗 Linked issue

Resolves #300

📚 Description

📝 Checklist

• I have linked an issue or discussion.
• I have updated the documentation accordingly.

[vercel]

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Project	Deployment	Actions	Updated (UTC)
evlog-docs	Error	Open in v0	Apr 27, 2026 9:26pm

[github-actions]

Thank you for following the naming conventions! 🙏

[github-actions]

Benchmark report

Bundle size

Threshold: 5% · 🔴 larger · 🟡 warning · 🟢 smaller · ⚪ unchanged · 🆕 new

Status	Entry	Base (gzip)	Current (gzip)	Change	Raw delta
🔴	workers	982 B	1.31 kB	+36.5%	+1.06 kB
⚪	framework/nitro	6.86 kB	6.86 kB	0.0%	0 B
⚪	framework/ai	4.25 kB	4.25 kB	0.0%	0 B
⚪	adapter/datadog	2.45 kB	2.45 kB	0.0%	0 B
⚪	framework/vite	2.41 kB	2.41 kB	0.0%	0 B
⚪	adapter/sentry	2.35 kB	2.35 kB	0.0%	0 B
⚪	adapter/otlp	2.10 kB	2.10 kB	0.0%	0 B
⚪	enrichers	1.92 kB	1.92 kB	0.0%	0 B
⚪	utils	1.59 kB	1.59 kB	0.0%	0 B
⚪	adapter/posthog	1.51 kB	1.51 kB	0.0%	0 B
⚪	error	1.46 kB	1.46 kB	0.0%	0 B
⚪	adapter/fs	1.42 kB	1.42 kB	0.0%	0 B
⚪	pipeline	1.36 kB	1.36 kB	0.0%	0 B
⚪	adapter/axiom	1.33 kB	1.33 kB	0.0%	0 B
⚪	http	1.23 kB	1.23 kB	0.0%	0 B
⚪	adapter/hyperdx	1.19 kB	1.19 kB	0.0%	0 B
⚪	adapter/better-stack	1.09 kB	1.09 kB	0.0%	0 B
⚪	browser	291 B	291 B	0.0%	0 B
⚪	client	128 B	128 B	0.0%	0 B
⚪	types	31 B	31 B	0.0%	0 B
⚪	framework/next	4.24 kB	4.24 kB	-0.1%	0 B
⚪	framework/sveltekit	1.60 kB	1.60 kB	-0.1%	0 B
⚪	framework/express	772 B	771 B	-0.1%	0 B
⚪	framework/nestjs	1.28 kB	1.27 kB	-0.2%	0 B
⚪	framework/fastify	1.06 kB	1.05 kB	-0.2%	0 B
⚪	framework/elysia	1.15 kB	1.15 kB	-0.3%	0 B
⚪	toolkit	316 B	315 B	-0.3%	0 B
⚪	framework/hono	614 B	612 B	-0.3%	0 B
⚪	core (index)	426 B	424 B	-0.5%	0 B
⚪	logger	211 B	209 B	-0.9%	0 B
⚪	Total	47.51 kB	47.84 kB	+0.7%	+1.06 kB

[HugoRCD]

@wladpaiva Could you try whether the bug still exists using this new method and pkg.pr.new?
npm i https://pkg.pr.new/evlog@311

[pkg-pr-new]

npm i https://pkg.pr.new/evlog@311

npm i https://pkg.pr.new/@evlog/nuxthub@311

commit: 3d5a764

[wladpaiva]

Awesome! It works by using initLogger in combination with
createRequestLogger(request, { waitUntil: locals.cfContext.waitUntil.bind(locals.cfContext) })

Thanks @HugoRCD