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nextjs - 💡(How to fix) Fix Unable to delete dlp-id on ol webkit

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Error Message

The application will error with this message

Fix Action

Fix / Workaround

It was confirmed by a local patch that we deployed

Code Example

<img width="263" height="307" alt="Image" src="https://github.com/user-attachments/assets/32c0df77-4cac-43a7-9a6a-ed5b98ce3cdb" />

### Current vs. Expected behavior

The expectation is that the application run on an old webkit browser.

### Provide environment information

---

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

Not sure

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

Other (Deployed), next dev (local)

### Additional context

We narrow down the problem to this line

---

in
RAW_BUFFERClick to expand / collapse

Link to the code that reproduces this issue

https://github.com/kyamaz99/next.js

To Reproduce

Start a next application after 16.2.0 in a safari 9 which is used in playstation 4. The application will error with this message TypeError: Unable to delete property

<img width="263" height="307" alt="Image" src="https://github.com/user-attachments/assets/32c0df77-4cac-43a7-9a6a-ed5b98ce3cdb" />

Current vs. Expected behavior

The expectation is that the application run on an old webkit browser.

Provide environment information

Safari 9

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

Not sure

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

Other (Deployed), next dev (local)

Additional context

We narrow down the problem to this line delete document.documentElement.dataset.dplId in packages/next/src/shared/lib/deployment-id.ts

It seems to be related of how webkit implemented dataset, as discussed in this thread

It was confirmed by a local patch that we deployed

<img width="528" height="98" alt="Image" src="https://github.com/user-attachments/assets/a6aab79a-4347-423e-8631-6dd317535576" />

This single changes enable us to use [email protected] on old playstation 4.

The same fix was applied in this fork

It's a very niche edge case but as the fix involved just using a different method with no regression, we thought it would worse creating an issue with a fix

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