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Make connection() work in the browser - #97211

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Make connection() work in the browser#97211
lubieowoce wants to merge 1 commit into
lubieowoce/refactor-connectionfrom
lubieowoce/connection-in-browser

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@lubieowoce lubieowoce commented Aug 11, 2026

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Closes NAR-789

Makes connection() work in the browser, same as use(io()).

Note that in order to make import { connection } from 'next/server' not pull in a bunch of server code,
we have to exclude all other exports in server.js. This may technically be a breaking change, although
i don't believe any of those were actually useful in browser code, so this seems fine.

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Tests Passed

Commit: 8f429ea

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Stats from current PR

🟢 2 improvements

Metric Canary PR Change Trend
Turbo Build Time 6.203s 5.801s 🟢 402ms (-6%) ▁▃▁▃▄
Webpack Build Time (cached) 24.550s 24.042s 🟢 508ms (-2%) █▂▁▁▁
📊 All Metrics
📖 Metrics Glossary

Dev Server Metrics:

  • Listen = TCP port starts accepting connections
  • First Request = HTTP server returns successful response
  • Cold = Fresh build (no cache)
  • Warm = With cached build artifacts

Build Metrics:

  • Fresh = Clean build (no .next directory)
  • Cached = With existing .next directory

Change Thresholds:

  • Time: Changes < 50ms AND < 10%, OR < 2% are insignificant
  • Size: Changes < 1KB AND < 1% are insignificant
  • All other changes are flagged to catch regressions

⚡ Dev Server

Metric Canary PR Change Trend
Cold (Listen) 813ms 812ms ✓ ▅▅▁▄▅
Cold (Ready in log) 796ms 792ms ✓ ▃▄▁▄▅
Cold (First Request) 1.306s 1.315s ✓ ▂▄▁▄▅
Warm (Listen) 814ms 813ms ✓ ▄▅▁▅▅
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📦 Dev Server (Webpack) (Legacy)

📦 Dev Server (Webpack)

Metric Canary PR Change Trend
Cold (Listen) 813ms 812ms ✓ █▁▁▁▁
Cold (Ready in log) 787ms 772ms ✓ █▂▁▁▁
Cold (First Request) 3.403s 3.334s ✓ █▂▂▁▁
Warm (Listen) 813ms 811ms ✓ █▂▂▂▂
Warm (Ready in log) 787ms 778ms ✓ █▂▂▁▁
Warm (First Request) 3.373s 3.319s ✓ █▂▂▁▁

⚡ Production Builds

Metric Canary PR Change Trend
Fresh Build 6.203s 5.801s 🟢 402ms (-6%) ▁▃▁▃▄
Cached Build 2.948s 2.966s ✓ ▂▂▁▆▆
📦 Production Builds (Webpack) (Legacy)

📦 Production Builds (Webpack)

Metric Canary PR Change Trend
Fresh Build 24.255s 23.800s ✓ █▂▁▁▁
Cached Build 24.550s 24.042s 🟢 508ms (-2%) █▂▁▁▁
node_modules Size 553 MB 553 MB ✓ ▁▁▁▁▁
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📎 Tarball URL 
https://vercel-packages.vercel.app/next/commits/8f429ea651fce567f95301c7987dbd80c3f48a1e/next

Commit: 8f429ea

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