Four boxes and the one above them that knows how many are ticked — where the minus unbends into the check.
The prompt16,014 characters
Add the "Checkbox" 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 Checkbox, 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-4
--ink-rgb
--on-ink
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.
--- Checkbox.tsx ---
import { useEffect, useRef, useState } from "react";
/* ══ Checkbox ═════════════════════════════════════════════
Four boxes and the one above them that knows how many are
ticked.
THE MINUS UNBENDS INTO THE CHECK. Every checkbox in the
world draws its indeterminate state as a different glyph —
a dash swapped for a tick — and the swap is a cut: two
marks, one of which is deleted. They are the same three
points here. The dash is the check with its elbow pushed
back down onto the line, so ticking the last box lifts that
elbow and the minus becomes the tick without anything being
replaced. One shape, two readings, and the mixed state
finally looks like what it means: a check that is not
finished bending.
AND THE MARK IS WRITTEN, NOT FADED. The stroke is drawn
along its own length — short arm first, the way a hand
writes one — over 260ms. A check that fades in arrives
everywhere at once, which is the one thing a handwritten
mark never does. */
const W = 300;
The rest — the source and its comments — is what the plan opens.