Microsoft/vscode

diffEditor.removedTextBorder bug border overlaps a bug that displaces lines

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#277259 opened on Nov 13, 2025

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 (1 comment) (0 reactions) (1 assignee)TypeScript (74,848 stars) (10,221 forks)batch import
bugdiff-editorhelp wanted

Description

Does this issue occur when all extensions are disabled?: Yes

  • VS Code Version: 1.106.0-insider
  • OS Version: Windows

Steps to Reproduce:

  1. Open a file removals/additions right next to each other.
  2. Open settings.json and add the following lines:
    "diffEditor.insertedTextBorder": "#bcdbc9",
    "diffEditor.removedTextBorder": "#ff07076c",
  1. Note how the border behaves differently between addition and deletion, on deletion, it shifts the line down and right (for the border), does not happen in addition.

Sharing a small gif enabling the two borders on and off.

Image

Contributor guide

Tech stack
typescriptcss
Domain
frontend
Issue type
bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-2 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
blocked
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
ability to build VS Code from sourcebasic knowledge of TypeScript and CSSfamiliarity with VS Code's diff editor
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
20
Research direction
The bug is in the diff editor's border rendering for removed text. The border shifts lines down and right. Look at the diff editor CSS classes related to `removedTextBorder` in the VS Code source, likely in `src/vs/editor/contrib/diffEditor/` directory. Compare with `insertedTextBorder` to find the difference. The issue has an assignee, so check if there is an associated PR or comment before starting.