Two panes and a handle with detents at the thirds — and past the minimum the pane folds to its rail.
The prompt17,752 characters
Add the "Resizable" 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 Resizable, from the source below.
2. Install what it needs: npm i lucide-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-2
--ink-3
--ink-4
--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.
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.
--- Resizable.tsx ---
import { useEffect, useRef, useState } from "react";
import { FileText, Image, Layers, Type } from "lucide-react";
/* ══ Resizable ════════════════════════════════════════════
Two panes and the line between them, which has opinions.
THE HANDLE HAS DETENTS, AND THE FINGER KEEPS GOING WITHOUT
IT. A divider that lands exactly where you put it sounds
like the respectful choice and is the tiring one: nobody
wants 197px, they want a third, or half, or two thirds, and
they want it without aiming. Within ten pixels of one of
those, the handle is pulled the rest of the way.
The trap — and the first version fell straight into it — is
to snap the handle and then keep measuring from the handle.
Every small move is then read from the detent it was just
pulled to, lands inside the same ten pixels, and is pulled
back: the divider is glued to the middle and the drag does
nothing at all. So the FINGER has its own position, which
no magnet ever touches, and the handle is what that number
looks like once the detents have had their say. Ten pixels
in and it sticks; ten pixels out and it is free, exactly
like a real detent, because the thing being measured is the
hand rather than the thing the hand is moving.
The rest — the source and its comments — is what the plan opens.