Header Actions Sidebar Block for React

It adds an "Untitled note" at the top of the Notes list in the block's own state, makes it the open note, closes the search if it was open and moves focus to the new row, so you can start working with the keyboard. Press it again and the next one is "Untitled note 2". The page shows a short placeholder, because nothing here is edited or saved; the notes live in NOTES and in the block's state until the page reloads.

Pressing Search, or the slash key while focus is inside the window and not in a field, turns the Notes label into a search field and focuses it. The list filters as you type, matching the title and the text of each note after the same fold applied to both (case and accents ignored), so the rows shown are exactly the notes that match. The status line says "2 of 8 notes match" half a second after you stop typing, and a query that matches nothing says "No notes match" in the list's place. Escape, or pressing the button again, closes the field, clears it and returns focus to the button.

The rail folds to its icons: the New note and Search buttons and the search field go with the labels, and the sidebar trigger stays under the mark with a tooltip that now says "Expand sidebar". Each note keeps its icon with a tooltip showing its title. The provider is set with persist={false} and shortcut={false}, so the block writes no cookie and leaves Ctrl and Command with B to the page it sits on.

Everything. The eight notes are typed in NOTES; New note, the search and the open note all work on the block's own state, and nothing is saved, synced or shared. Replace the handlers with your API and keep the same split: create, then open and focus the new note; search, then filter the list. The notes are links to # whose handler shows the note instead of navigating. They're SidebarMenuButtons with render set to an a element.

Below the medium breakpoint the sidebar is a sheet opened by the menu button in the top bar, from the start edge, the right in a right-to-left layout. The header's buttons are inside it: New note adds a note and focuses its row without closing the sheet, Search opens the field in the list, and choosing a note closes the sheet and shows it. The window keeps its height.

All three header buttons are named, whatever their tooltips say: "New note", "Search notes" (a toggle that reports whether the field is open) and "Toggle Sidebar". Tooltips open on focus as well as on hover. The notes are links in a navigation landmark named after the product, the open one marked as the current page. One polite status line reports a new note, the search count and each note you open, and the open note is a scrollable region you can reach with Tab, named by its title.