fix(site): enable word-level inline diff highlighting in DiffViewer#23423
Merged
DanielleMaywood merged 1 commit intomainfrom Mar 23, 2026
Merged
fix(site): enable word-level inline diff highlighting in DiffViewer#23423DanielleMaywood merged 1 commit intomainfrom
DanielleMaywood merged 1 commit intomainfrom
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The diffViewerCSS override was applying `background-color: transparent !important` to all `[data-line]` elements (except selected lines). This killed the library's colored backgrounds on change-addition and change-deletion lines, hiding both the line-level tint and the word-level emphasis highlights that @pierre/diffs computes by default. Narrow the transparent override to exclude `[data-line-type='change-addition']` and `[data-line-type='change-deletion']` so the library's built-in addition/deletion backgrounds and inline word-diff emphasis are preserved — matching the highlighting behavior users expect from GitHub's diff view.
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johnstcn
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Mar 23, 2026
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Problem
Changed lines in the DiffViewer only had a full-line background tint with no indication of which specific words changed. This made it difficult to spot the actual modifications within a line, especially on lines with small edits.
Solution
Enable the
lineDiffType: "word"option from@pierre/diffsingetDiffViewerOptions. This adds a darker highlight on the specific changed words within addition/deletion lines, on top of the existing line-level background — matching the behavior users expect from GitHub's diff view.This applies everywhere
getDiffViewerOptionsis used: the mainDiffViewer, plus theTool,WriteFileTool, andEditFilesToolcomponents.