Rank, 14 days: 1 on the Next.js sheet
5 people reported

All time, since Oct 13, including 4 thumbs-up on GitHub.

JS chunks downloaded twice

“A CORS request and a no-CORS request for the same URL have different HTTP cache keys, so the second tag downloads the chunk again.”

Is this your bug? What gets counted gets fixed. Pile on.

Paste this into your agent. It files your report, with your error and version.

I hit this bug: rapsheet.dev/sheets/next-js/issues/12191/file
Follow it to file my report. Show me the text before you send.

No install. No account. Public and anonymous. The link asks your agent for one report, nothing else. What it sends

JS chunks download twice on client navigation with crossOrigin. Turbopack's loader adds a crossorigin script tag, then the segment's hoistable <script async> drops crossOrigin, leaving two tags.

Is this your bug?

File my report
Where
App Router navigation
Versions
16.5.0-canary.8 to 16.5.0-canary.21
Platforms
Linux
How bad
Breaks a normal workflow.

Not quite your bug?

  1. Boundary scripts missing CSP nonce2 people
  2. Dynamic preloads not reused1 person
  3. Nested next/dynamic CSS missing1 person

Original reports2, newest first

  1. Turbopack: with crossOrigin set, a client navigation downloads the page's JS chunk twice (the segment's hoistable <script> drops crossOrigin)On GitHub#100533
  2. With crossOrigin: "anonymous", every JS chunk a client-side navigation loads is downloaded twice (two <script> tags per chunk: the Turbopack loader's and React's hoistable)On GitHub#100132

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