Release Notes Changelog Block for React

The Toc watches the four section headings as you scroll and marks the entry for the one on screen with a bar that slides to it. Every entry is also a plain anchor link, so it works without the highlight and for keyboard users: Tab to an entry and press Enter to jump to its heading.

Edit the Section constants and the SECTIONS list at the top of the file for the anchors and titles, and the Band blocks in the article for the text. The contents list, the chips on a phone and the headings' ids are all built from SECTIONS, so they cannot drift apart.

So the release itself is what a screen reader reaches first after the title, and the contents list is a shortcut after it. On a wide screen the contents list is drawn in the start column beside the article; on a phone it is drawn above the article as chips.

The command sits in a focusable region that scrolls on a narrow phone, and it is plain text you can select. It has no Copy button here, since the block's one control is the contents list.

The sticky list gives way to a row of chips that scrolls sideways above the article, each an anchor to its section, and the article reads in one column under it.

The header and the article fade up once on load and the contents bar slides between entries. With reduced motion the entrance is off and the bar jumps. Jumping to a section follows your browser's own scroll setting.