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nextjs - 💡(How to fix) Fix Warning [baseline-browser-mapping] The data in this module is over two months old. [1 comments, 2 participants]

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vercel/next.js#86643•Fetched 2026-04-08 02:10:01
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LDamiLDami
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github-actions[bot]github-actions[bot]LDamiLDami
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Code Example

Operating System:
  Platform: win32
  Arch: x64
  Version: Windows 11 Pro
  Available memory (MB): 16303
  Available CPU cores: 12
Binaries:
  Node: 22.20.0
  npm: 10.9.3
  Yarn: N/A
  pnpm: N/A
Relevant Packages:
  next: 16.1.0-canary.4 // Latest available version is detected (16.1.0-canary.4).
  eslint-config-next: N/A
  react: 19.2.0
  react-dom: 19.2.0
  typescript: 5.9.3
Next.js Config:
  output: N/A
RAW_BUFFERClick to expand / collapse

Link to the code that reproduces this issue

https://github.com/vercel/next.js/tree/canary/examples/reproduction-template

To Reproduce

  1. Create a new app with npx create-next-app --example reproduction-template reproduction-app
  2. Start the application with npx next dev

Current vs. Expected behavior

Current behavior: The message "[baseline-browser-mapping] The data in this module is over two months old. To ensure accurate Baseline data, please update: npm i baseline-browser-mapping@latest -D" is displayed on the version v16.0.5.

Expected behavior: This message should not be displayed.

Provide environment information

Operating System:
  Platform: win32
  Arch: x64
  Version: Windows 11 Pro
  Available memory (MB): 16303
  Available CPU cores: 12
Binaries:
  Node: 22.20.0
  npm: 10.9.3
  Yarn: N/A
  pnpm: N/A
Relevant Packages:
  next: 16.1.0-canary.4 // Latest available version is detected (16.1.0-canary.4).
  eslint-config-next: N/A
  react: 19.2.0
  react-dom: 19.2.0
  typescript: 5.9.3
Next.js Config:
  output: N/A

Which area(s) are affected? (Select all that apply)

create-next-app

Which stage(s) are affected? (Select all that apply)

next dev (local), next build (local)

Additional context

Linked to this issue: https://github.com/vercel/next.js/issues/86635

extent analysis

TL;DR

Update the baseline-browser-mapping package to the latest version using npm i baseline-browser-mapping@latest -D to potentially resolve the issue.

Guidance

  • The warning message suggests that the data in the baseline-browser-mapping module is outdated, which might be causing the issue.
  • Verify that the baseline-browser-mapping package is up-to-date by checking the version in the package.json file.
  • Try updating the package using the suggested command npm i baseline-browser-mapping@latest -D and see if the warning message disappears.
  • If the issue persists, check the linked GitHub issue (https://github.com/vercel/next.js/issues/86635) for any updates or workarounds.

Example

No code snippet is provided as it is not necessary for this specific issue.

Notes

The issue seems to be related to the baseline-browser-mapping package being outdated, but it's unclear if updating the package will fully resolve the issue. Further investigation may be required.

Recommendation

Apply workaround: Update the baseline-browser-mapping package to the latest version using npm i baseline-browser-mapping@latest -D, as this is the suggested solution in the warning message and may potentially resolve the issue.

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