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ComplementaryArea: Inline z-index values #77717

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ComplementaryArea: Inline z-index values #77717

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ComplementaryArea: Inline z-index values
mirka Apr 27, 2026
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Add changelog
mirka Apr 27, 2026
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Tweak
mirka Apr 27, 2026
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1 change: 1 addition & 0 deletions packages/base-styles/CHANGELOG.md
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Original file line number Diff line number Diff line change
Expand Up @@ -6,6 +6,7 @@

- Remove `.components-resizable-box__handle`, `.components-resizable-box__side-handle`, and `.components-resizable-box__corner-handle` from the `z-index()` helper ([#77620](https://github.com/WordPress/gutenberg/pull/77620)).
- Remove `.components-form-toggle__input` from the `z-index()` helper ([#77619](https://github.com/WordPress/gutenberg/pull/77619)).
- Remove `.interface-complementary-area .components-panel` and `.interface-complementary-area .components-panel__header` from the `z-index()` helper ([#77717](https://github.com/WordPress/gutenberg/pull/77717)).
- Remove `.components-button {:focus or .is-primary}` from the `z-index()` helper ([#77621](https://github.com/WordPress/gutenberg/pull/77621)).

## 6.20.0 (2026-04-15)
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4 changes: 0 additions & 4 deletions packages/base-styles/_z-index.scss
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Expand Up @@ -17,10 +17,6 @@ $z-layers: (
".block-library-query-pattern__selection-search": 2, // higher sticky element
".editor-post-template__swap-template-search": 2, // higher sticky element

// These next two share a stacking context
".interface-complementary-area .components-panel" : 0, // lower scrolling content
".interface-complementary-area .components-panel__header": 1, // higher sticky element

".components-modal__header": 10,
".edit-post-meta-boxes-area.is-loading::before": 1,
".edit-post-meta-boxes-area .spinner": 5,
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5 changes: 2 additions & 3 deletions packages/interface/src/components/complementary-area/style.scss
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@@ -1,7 +1,6 @@
@use "@wordpress/base-styles/colors" as *;
@use "@wordpress/base-styles/mixins" as *;
@use "@wordpress/base-styles/variables" as *;
@use "@wordpress/base-styles/z-index" as *;

.interface-complementary-area {
background: $white;
Expand All @@ -17,13 +16,13 @@
border: none;
// Make a stacking context that keeps all descendents behind the sticky header
position: relative;
z-index: z-index(".interface-complementary-area .components-panel");
z-index: 0;
}

.components-panel__header {
position: sticky;
top: 0;
z-index: z-index(".interface-complementary-area .components-panel__header");
z-index: 1;
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@ciampo ciampo Apr 28, 2026

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Suggested change
z-index: 1;
// Sit above the panel's scrolling content within the stacking context above.
z-index: 1;


&.editor-sidebar__panel-tabs {
top: 0;
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