Three sections; the one opening takes the room the one closing gives up.
The prompt17,911 characters
Add the "Accordion" component from notboring to my project.
It is licensed for use in my projects — notboring.dev/license. Please:
1. Create the component at a sensible path for this
project, named Accordion, from the source below.
2. It needs nothing beyond React.
3. Add the CSS to the project's stylesheet.
4. THE PART THAT NEEDS YOUR JUDGMENT. The CSS reads
these custom properties and does not define them:
--card
--font-ui
--ink
--ink-3
--ink-rgb
--pane-edge
They are notboring's design tokens. Map each one to
whatever this project already uses for the same
job — its own ink, ground, surface and UI font —
rather than defining them as new globals. If the
project has no equivalent, define it locally on
the component's own root so nothing leaks out.
Anything ending -rgb wants three bare numbers,
because the CSS builds rgba() from it.
5. IF YOU CHANGE IT, GO ALL THE WAY. This block is
built for every state its object can really be
in — empty, one, full, refused, undone, pressed
twice, interrupted halfway — and not only the one
the demo opens on. Adapt it and the same standard
holds: work out that list before you write, and
build the whole of it. Never settle for the
minimum that makes the screenshot right. A
component somebody has to come back and finish is
the thing this was written to replace.
Keep the comments. They say why the numbers are what
they are, and they are most of what makes this worth
copying rather than rewriting.
--- Accordion.tsx ---
import { useEffect, useId, useLayoutEffect, useRef, useState } from "react";
/* ══ Accordion ════════════════════════════════════════════
Three questions, and one of them open.
THE ONE OPENING TAKES THE ROOM THE ONE CLOSING GIVES UP.
Both heights are read off the same clock — one runs from
its full height to nothing while the other runs from
nothing to its full height, on the same curve over the same
milliseconds — so the card's total height moves only by the
difference between the two answers, and the rows beneath
them barely shift. The obvious build gives each section a
transition of its own, which is the same numbers arriving a
frame apart: the card grows, then shrinks, and everything
under the change bobs.
ONE OPEN AT A TIME is the reason there is anything to
exchange. A list where every section can be open is a page
with some of it folded; a list where at most one is open is
a control, and the closing is part of the opening.
AND IT IS A BELLOWS, so the paper folds. A window that
uncovers a paragraph is a blind; this one CONCERTINAS — the
answer is squashed to seven-eighths of its height and
The rest — the source and its comments — is what the plan opens.