2.0.1

2.0.1

Performance fix: CSS selectors no longer trigger whole-document style recalculation. No functional or visual change (verified pixel by pixel), but the style recalc that happens on every scroll tick, tab switch, file click and sidebar toggle drops from ~10 ms to well under 1 ms — users who reported the UI feeling sluggish will notice the difference.

What changed

• Removed several base-theme selectors that forced a full-document recalc on any DOM mutation:
  • … .mod-root:has(+ … :hover): it cost this even with the "hover sidebar" option turned off
  • … .mod-sidedock:has(> .workspace-tabs.mod-active)
  • the … :hover + / ~ .mod-root … rule setting -webkit-app-region in the hover modes (it only affects window-drag hit areas, never paint)
  • the mobile keyboard check :not(html:where([style*="--keyboard-height…"]) body), which made every inline-style write recalculate the whole document → moved behind @media (pointer: coarse)
• OnePage's "dim other panes while editing" no longer uses body:has(…) (now unconditional at 8% / 20% opacity); the ribbon rule uses Obsidian's own .workspace.is-left-sidedock-open class instead
• Layout transitions are turned off while dragging a split or sidebar edge: width now follows the cursor immediately instead of catching up ~263 ms later (Obsidian already adds .is-grabbing to body while dragging, and .no-transition on the app container for sidebar resizing)

Measured (synthetic 6k-node workspace, style recalc per interaction)

Scenario	2.0.0	2.0.1
Scrolling (5-line viewport churn)	17.3 ms	1.8 ms
Switching tabs	17.0 ms	0.04 ms
Clicking a file in the explorer	1.2 ms	0.03 ms
Collapsing / expanding a sidebar	17.2 ms	0.27 ms
Dragging a split (inline width write)	16.9 ms	0.13 ms

Appearance

Injecting the old and new theme.css into the same DOM and comparing getComputedStyle (including pseudo-elements), element geometry and a full-page screenshot pixel by pixel: 9 scenarios (light / dark / translucent / collapsed sidebar / hover ribbon / demo mode / phone keyboard closed & open) show 0 differing pixels. Two deliberate differences remain:

• With a non-note view active (canvas, graph, PDF…), sidebars are also dimmed by 8% (previously only while a note was active)
• In "hover sidebar" / "hover ribbon" mode (off by default), dragging the tab bar no longer disables window dragging

Known, not addressed: scrolling through notes that contain blockquotes costs about 1.5 ms extra per frame (the base theme draws the rounded caps of quote blocks with sibling/has() selectors; removing them would flatten the corners).

Minimum Obsidian version is unchanged (1.14.0).