[Bug] The RegExp d Modifier was not support on Safari 14 const markRegex = /\bMARK:\s*(.*)$/d;

Reproducible in vscode.dev or in VS Code Desktop?

• Not reproducible in vscode.dev or VS Code Desktop

Reproducible in the monaco editor playground?

• Not reproducible in the monaco editor playground

Monaco Editor Playground Link

No response

Monaco Editor Playground Code

No response

Reproduction Steps

This website https://vscode.dev can't open at Safari 14 either, I can't test if it is Reproducible, so i just describe what the problem is.

I encountered an error on Safari 14 while using "monaco-editor": "^0.48.0". The error message is: Invalid regular expression: invalid flags

The error occurs at the following line of code:

const markRegex = /\bMARK:\s*(.*)$/d;

It appears similar to the issue reported at #2345.

You can find the specific line causing the error in the VSCode repository line 39:
https://github.com/microsoft/vscode/blob/5ae5a741bdb676abb667fd4896dc2a40e313db3a/src/vs/editor/common/services/findSectionHeaders.ts#L39

Environment
monaco-editor version: ^0.48.0
Browser: Safari 14

Additional Information
According to the W3Schools documentation, the /d modifier was introduced in ES2022. It seems this modifier is not supported in Safari 14.

Could you provide a workaround or a fix for this issue?

Actual (Problematic) Behavior

No response

Expected Behavior

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Additional Context

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Start at src/vs/editor/common/services/findSectionHeaders.ts, around line 39, where the /d regular-expression modifier is used, and review the related issue #2345. Confirm the compatibility behavior in Safari 14; done means the editor no longer fails with an invalid-regexp-flags error there.