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Site Sets Extras

Quality-of-life UX improvements for the TYPO3 v13 backend Site Settings / Site Sets area.

Requirements

• TYPO3 v13
• PHP 8.3+

Installation

The extension auto-activates via composer; no manual extension setup needed beyond the usual vendor/bin/typo3 extension:setup.

Features

Collapsible navigation

The Site Settings module's left-hand navigation gains collapsible parent blocks. All blocks start collapsed by default. Click the chevron in front of a parent label to fold/unfold its children.

• Expanded state is persisted in localStorage per site (key: t3-settings-nav-expanded:<siteId>), so each site keeps its own preferences. Keys for categories no longer present in the configuration are pruned automatically on each render.
• Leaf items (no children, or whose only children are filtered out) show a faint bullet instead of the chevron.
• The chevron's clickable area is wider than the chevron itself (extended via an invisible pseudo-element) so it forgives slightly off-target clicks.

Bulk expand / collapse

Two buttons sit directly below the search input:

• Expand all — opens every collapsible block and writes them all to the persisted set.
• Collapse all — closes every block (active branch included) and empties the persisted set. The active-path auto-reveal is suppressed for the duration so the click feels final, releasing once the active leaf moves out of the closed branch.

Labels are translated via Resources/Private/Language/{locallang,de.locallang}.xlf — German is shipped, additional locales can be added as sibling <lang>.locallang.xlf files.

Active-path highlight

When you select or scroll to a category, its entire ancestor chain in the navigation gets a subordinate fill. The active leaf still wears core's outlined ring as the destination; ancestors read as the trail. Collapsed ancestors auto-reveal so the active leaf is always visible.

If you explicitly close a parent while a child of it is still the active leaf, the parent stays highlighted (you're still semantically inside it) but its children hide. The override is session-only — when the active leaf moves out of that branch, the auto-reveal is restored.

Keyboard

• Arrow Right — expand the currently active section
• Arrow Left — collapse the currently active section
• Enter / Space — navigate (unchanged)

Arrow keys always target the active section, regardless of which button has focus, so scrolling the body re-points them automatically.

Every collapsible nav button carries an aria-expanded attribute mirroring its visual state.

Click & scroll behaviour

• Clicking a nav item jumps instantly to its section. The previous smooth scroll caused core's IntersectionObserver to fire on every section in between, briefly revealing each branch en route.
• The first leaf of a parent now activates correctly on click — a brief post-click pin overrides the IntersectionObserver picking the still-partially-visible parent above it.
• Scrolling to the very bottom of the body marks the last leaf as active (core's "first visible in tree order" picker can never reach it on its own).

Search

Typing in the navigation's search field auto-reveals all collapsed branches so matches stay visible. Clearing the search restores the previous collapse state.

How it works

• A PSR-14 listener on BeforeJavaScriptsRenderingEvent adds a small ES module to every backend page's asset collection.
• A PSR-15 backend middleware registers the inline language label file via PageRenderer::addInlineLanguageLabelFile(). The asset listener fires too late for this — PageRenderer::renderMainJavaScriptLibraries() compiles inline labels into the TYPO3.lang global before the asset-render event runs.
• The module installs a MutationObserver on document.body and enhances any <typo3-backend-settings-editor> light-DOM tree it finds, re-running on every Lit re-render so search and state changes are handled correctly.
• A backend stylesheet is registered through $GLOBALS['TYPO3_CONF_VARS']['BE']['stylesheets'].

No vendor patching: TYPO3 core's compiled editor.js is left untouched.

License

GPL-2.0-or-later