VibeUI

Resizable

Two Panes

Two panes with a draggable separator where the mouse is not the only way in: the separator takes focus, arrows resize it, Home and End jump to the limits.

  • resizable
  • splitter
  • keyboard
  • panes

Preview

1440pxHost theme

Use it with AI

  1. 1. Copy the link.
  2. 2. Write to your agent in your own words and drop the link into the sentence.
  3. 3. The agent opens the link and installs the component from the registry.

put this in the header: https://vibeui.ru/c/resizable-001?lang=en

Входящие

Тяните разделитель или встаньте на него табом и жмите стрелки.

Договор на подпись

Правая панель занимает остаток: её ширина не хранится отдельно и потому не может разойтись с левой.

Левая панель — 42% ширины.

Show the full instructions

What the link says, spelled out. Use it when your agent cannot open links — paste this text instead.

# Install and place "resizable-001" (Two Panes) from VibeUI

## 1. Install first — do not skip, do not recreate
Run this exact command before writing any code:
npx shadcn@latest add https://vibeui.ru/r/resizable-001.json

Registry item: https://vibeui.ru/r/resizable-001.json
Installs to: components/vibeui/resizable-001.tsx (the exact path follows this project's components.json aliases).
npm dependencies: none.
Registry dependencies: none.

Install it from the registry. Do not recreate it from the description,
do not substitute a similar component from another library, and do not
rewrite it to match the project's existing style.

## 2. What it is
Two panes with a draggable separator where the mouse is not the only way in: the separator takes focus, arrows resize it, Home and End jump to the limits.

Two panes with a separator that works by mouse, by touch and from the keyboard: arrows step, Home and End hit the limits. One file, zero dependencies.

## 3. How to use it
import { Resizable001 } from "@/components/vibeui/resizable-001"

<Resizable001
  label="List width"
  defaultSize={42}
  min={20}
  max={80}
/>

Read the installed file for the full prop list.

## 4. Where to place it
This is a small inline component. Put it exactly where the user asked,
inside the existing markup. Do not create a new page, section or
wrapper for it. If a similar control already sits in that spot,
replace it instead of adding a second one.

Placement: ___
(The user fills this line in. If it is still blank, ask where to put it
instead of guessing.)

## 5. Keep exactly as installed
- the local --vibeui-resizable-001-* palette — do not swap it for your theme tokens
- role="separator" with tabIndex 0 and aria-valuenow: without them the size is mouse-only
- the arrow, Home and End handling — a required part of the window splitter pattern
- setPointerCapture: without capture the drag breaks on a fast movement
- touch-action:none on the bar, otherwise a phone scrolls the page instead of dragging
- the wide hit target around the thin line: nobody hits one pixel with a mouse

## 6. You may change
- the separator name through label
- the initial width through defaultSize
- the limits through min and max, the keyboard increment through step
- the bar and focus colour through accent

## 7. Rules
- The size is in percent: on a very narrow screen the left pane can become uselessly thin — raise min.
- aria-valuenow is rounded to an integer, so the announced value is slightly coarser than the real one.
- The pane content is an example: replace it but keep min-width:0, or the pane stops shrinking.
- Do not lift the CSS variables into globals.css: the component has to stay a single file.

## 8. Verify
- it renders with no console errors;
- it looks like the preview on the VibeUI page you copied this from;
- if it does not, you changed something listed in section 5 — put it back.

For developers

npx shadcn@latest add https://vibeui.ru/r/resizable-001.json
https://vibeui.ru/r/resizable-001.json

Один файл, ноль зависимостей, палитра --vibeui-resizable-001-*. Клиентский: useState, useRef на рамку и useId. Разделитель — это role="separator" с tabIndex 0, aria-orientation="vertical", aria-valuenow/min/max и aria-controls на левую панель, то есть паттерн window splitter целиком. Перетаскивание держится на setPointerCapture: события продолжают приходить, даже когда курсор ушёл за пределы полосы, а touch-action:none не даёт странице прокрутиться под пальцем. Размер хранится в процентах и применяется к левой панели, правая занимает остаток — сумма не может разъехаться.

Component source

The same file your agent installs. Here in case you would rather copy it by hand.

"use client"

import { useId, useRef, useState } from "react"
import type {
  ComponentPropsWithoutRef,
  CSSProperties,
  KeyboardEvent,
  PointerEvent,
} from "react"

export type Resizable001Props = Omit<
  ComponentPropsWithoutRef<"div">,
  "children" | "onChange"
> & {
  label?: string
  defaultSize?: number
  min?: number
  max?: number
  step?: number
  onChange?: (size: number) => void
  accent?: string
}

// Идея компонента: две панели с перетаскиваемым разделителем, у которого мышь
// — не единственный способ. Разделитель объявлен role="separator" с
// aria-valuenow и берёт фокус, поэтому размер меняется стрелками, а Home и End
// уводят его к краям. Захват указателя отдан браузеру: setPointerCapture
// продолжает слать события, даже когда курсор ушёл за пределы полосы.
const STYLES = `
:where([data-vibeui-block="resizable-001"]){
--vibeui-resizable-001-bg:oklch(1 0 0);
--vibeui-resizable-001-fg:oklch(0.22 0.014 265);
--vibeui-resizable-001-muted:oklch(0.55 0.014 265);
--vibeui-resizable-001-border:oklch(0.9 0.006 265);
--vibeui-resizable-001-surface:oklch(0.975 0.004 265);
--vibeui-resizable-001-accent:oklch(0.55 0.17 265);
--vibeui-resizable-001-font:ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
}
[data-vibeui-block="resizable-001"]{
box-sizing:border-box;display:flex;flex-direction:column;gap:0.5rem;
width:100%;max-width:34rem;padding:0.875rem;
border:1px solid var(--vibeui-resizable-001-border);border-radius:0.875rem;
background:var(--vibeui-resizable-001-bg);color:var(--vibeui-resizable-001-fg);
font-family:var(--vibeui-resizable-001-font);
}
[data-vibeui-block="resizable-001"] *{box-sizing:border-box}
[data-vibeui-block="resizable-001"] [data-part="frame"]{
display:flex;align-items:stretch;height:11rem;
border:1px solid var(--vibeui-resizable-001-border);border-radius:0.75rem;overflow:hidden;
background:var(--vibeui-resizable-001-surface);
}
[data-vibeui-block="resizable-001"] [data-part="pane"]{
min-width:0;padding:0.75rem;overflow:auto;background:var(--vibeui-resizable-001-bg);
}
[data-vibeui-block="resizable-001"] [data-part="pane"][data-role="primary"]{flex:none}
[data-vibeui-block="resizable-001"] [data-part="pane"][data-role="rest"]{flex:1}
[data-vibeui-block="resizable-001"] h3{margin:0 0 0.375rem;font-size:0.8125rem;font-weight:650}
[data-vibeui-block="resizable-001"] p{margin:0;font-size:0.75rem;line-height:1.5;color:var(--vibeui-resizable-001-muted)}
/* Полоса-разделитель шире своей видимой линии: попасть в 1 пиксель мышью
   почти невозможно, поэтому цель нажатия — 0.75rem, а линия внутри тонкая. */
[data-vibeui-block="resizable-001"] [data-part="split"]{
flex:none;width:0.75rem;padding:0;border:0;position:relative;
background:var(--vibeui-resizable-001-surface);
cursor:col-resize;touch-action:none;
transition:background-color .15s ease;
}
[data-vibeui-block="resizable-001"] [data-part="split"]::before{
content:"";position:absolute;inset:0 calc(50% - 0.5px);
background:var(--vibeui-resizable-001-border);
}
[data-vibeui-block="resizable-001"] [data-part="split"]::after{
content:"";position:absolute;top:50%;left:50%;
width:0.1875rem;height:1.75rem;margin:-0.875rem 0 0 -0.09375rem;border-radius:9999px;
background:var(--vibeui-resizable-001-border);
}
[data-vibeui-block="resizable-001"] [data-part="split"]:hover::after,
[data-vibeui-block="resizable-001"] [data-part="split"][data-dragging="true"]::after{
background:var(--vibeui-resizable-001-accent);
}
[data-vibeui-block="resizable-001"] [data-part="split"]:focus-visible{
outline:2px solid var(--vibeui-resizable-001-accent);outline-offset:-2px;
}
[data-vibeui-block="resizable-001"] [data-part="status"]{
margin:0;font-size:0.75rem;color:var(--vibeui-resizable-001-muted);
font-variant-numeric:tabular-nums;
}
@media (prefers-reduced-motion:reduce){[data-vibeui-block="resizable-001"] *{animation:none!important;transition:none!important}}
`

/**
 * Две панели с разделителем, который работает и мышью, и с клавиатуры:
 * стрелки меняют размер, Home и End уводят к краям. Один файл.
 */
export function Resizable001({
  label = "Ширина списка",
  defaultSize = 42,
  min = 20,
  max = 80,
  step = 4,
  onChange,
  accent,
  className,
  style,
  ...props
}: Resizable001Props) {
  const [size, setSize] = useState(defaultSize)
  const [dragging, setDragging] = useState(false)
  const frame = useRef<HTMLDivElement>(null)
  const paneId = useId()

  const palette = {
    ...(accent ? { "--vibeui-resizable-001-accent": accent } : null),
    ...style,
  } as CSSProperties

  const apply = (next: number) => {
    const clamped = Math.min(max, Math.max(min, next))

    setSize(clamped)
    onChange?.(clamped)
  }

  const dragTo = (event: PointerEvent<HTMLDivElement>) => {
    const box = frame.current?.getBoundingClientRect()

    if (!box || box.width === 0) {
      return
    }

    apply(((event.clientX - box.left) / box.width) * 100)
  }

  const onKeyDown = (event: KeyboardEvent<HTMLDivElement>) => {
    if (event.key === "ArrowLeft") {
      event.preventDefault()
      apply(size - step)
    } else if (event.key === "ArrowRight") {
      event.preventDefault()
      apply(size + step)
    } else if (event.key === "Home") {
      event.preventDefault()
      apply(min)
    } else if (event.key === "End") {
      event.preventDefault()
      apply(max)
    }
  }

  return (
    <>
      <style href="vibeui-resizable-001" precedence="medium">
        {STYLES}
      </style>
      <div
        {...props}
        data-vibeui-block="resizable-001"
        className={className}
        style={palette}
      >
        <div data-part="frame" ref={frame}>
          <section
            data-part="pane"
            data-role="primary"
            id={paneId}
            style={{ width: `${size}%` }}
            aria-label="Список писем"
          >
            <h3>Входящие</h3>
            <p>
              Тяните разделитель или встаньте на него табом и жмите стрелки.
            </p>
          </section>
          <div
            data-part="split"
            role="separator"
            tabIndex={0}
            aria-orientation="vertical"
            aria-label={label}
            aria-controls={paneId}
            aria-valuenow={Math.round(size)}
            aria-valuemin={min}
            aria-valuemax={max}
            data-dragging={dragging}
            onKeyDown={onKeyDown}
            onPointerDown={(event) => {
              event.currentTarget.setPointerCapture(event.pointerId)
              setDragging(true)
            }}
            onPointerMove={(event) => {
              if (dragging) {
                dragTo(event)
              }
            }}
            onPointerUp={(event) => {
              event.currentTarget.releasePointerCapture(event.pointerId)
              setDragging(false)
            }}
            onPointerCancel={() => setDragging(false)}
          />
          <section data-part="pane" data-role="rest" aria-label="Письмо">
            <h3>Договор на подпись</h3>
            <p>
              Правая панель занимает остаток: её ширина не хранится отдельно и
              потому не может разойтись с левой.
            </p>
          </section>
        </div>
        <p data-part="status" role="status">
          Левая панель — {Math.round(size)}% ширины.
        </p>
      </div>
    </>
  )
}