Line items, quantities, a promo code, and one total that is never stored.
The prompt36,561 characters
Add the "Cart" 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 Cart, from the source below.
2. Install what it needs: npm i framer-motion
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
--danger
--danger-rgb
--font-ui
--ink
--ink-3
--ink-4
--ink-5
--ink-rgb
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.
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.
--- Cart.tsx ---
import { useEffect, useRef, useState } from "react";
import { AnimatePresence, motion } from "framer-motion";
/* ══ Cart ═════════════════════════════════════════════════
Three things in a basket, and the number at the bottom.
ONE TOTAL, DERIVED. There is no `total` in state. The rows
are the whole truth — a name, a unit price, a count — and
the subtotal, the discount and the figure on the button are
worked out from them on every render. A stored total is a
second copy of a fact that can disagree with the first, and
in a cart it will: change a count and forget it, take a row
out while a code is on, put the row back. The balance
chart's rule, applied to money: one array, and everything
else is arithmetic on it.
A ROW IS REMOVED IN TWO BEATS, AND THE FIRST CAN BE TAKEN
BACK. The cross, or the count to nought, does not delete
the row: the row's contents give way to a strip in the same
place — "Removed", and Undo — with a line along its foot
that drains over four seconds. That line is the window, and
you can see how much of it is left. Undo turns the strip
back into the row; the line running out is what collapses
it for real, the rows below closing up over it as one.
The rest — the source and its comments — is what you are buying.