VibeUI

Inputs

Markdown Toolbar Textarea

A field with a formatting toolbar: the buttons wrap the selection in markdown characters through setRangeText, so the browser's undo history stays alive.

  • textarea
  • toolbar
  • markdown
  • editor

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/textarea-004?lang=en

Markdown is supported: **жирный**, _курсив_

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 "textarea-004" (Markdown Toolbar Textarea) 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/textarea-004.json

Registry item: https://vibeui.ru/r/textarea-004.json
Installs to: components/vibeui/textarea-004.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
A field with a formatting toolbar: the buttons wrap the selection in markdown characters through setRangeText, so the browser's undo history stays alive.

A field with a markdown toolbar over a plain textarea. One file, zero dependencies, a client component.

## 3. How to use it
import { Textarea004 } from "@/components/vibeui/textarea-004"

<Textarea004
  label="Release notes"
  hint="Markdown is supported"
/>

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-textarea-004-* palette — do not swap it for your theme tokens
- setRangeText instead of rebuilding the string: writing straight into value wipes the browser's undo history
- restoring the selection after insertion — otherwise a second button press misses the text
- role="toolbar" on the panel: a set of buttons above the field has to be announced as a group
- the plain textarea instead of contenteditable: it submits with the form and needs no sanitiser
- the component's own light surface — without it the dark text disappears on a dark page

## 6. You may change
- the caption through label and the placeholder text through placeholder
- the hint under the field through hint
- the set of buttons in the TOOLS constant
- the accent colour through accent

## 7. Rules
- The component renders no preview: it edits the source, and whoever displays it parses the markup.
- Pressing again does not remove formatting — the wrapper is only added.
- The list button prefixes the current line, not every selected one: multi-line support needs extending the logic.
- 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/textarea-004.json
https://vibeui.ru/r/textarea-004.json

Клиентский компонент: useRef на textarea, useState на текст. Обёртка выделения сделана setRangeText, а не сборкой новой строки: только так браузер сохраняет собственную историю отмены и Ctrl+Z продолжает работать; после вставки выделение возвращается на место. Кнопка списка ставит префикс в начало текущей строки, найденной по последнему переводу строки. Панель объявлена role="toolbar". Палитра в --vibeui-textarea-004-*.

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 } from "react"

export type Textarea004Props = Omit<
  ComponentPropsWithoutRef<"div">,
  "children" | "onChange"
> & {
  label?: string
  placeholder?: string
  hint?: string
  accent?: string
}

// Идея компонента: панель форматирования над обычным textarea. Богатый
// редактор здесь не нужен — люди пишут в markdown, а кнопки просто
// оборачивают выделение символами. Обёртка сделана через setRangeText:
// он сохраняет историю отмены браузера, чего не делает прямая запись
// в value, и возвращает выделение на место, чтобы можно было жать дальше.
const STYLES = `
:where([data-vibeui-block="textarea-004"]){
--vibeui-textarea-004-bg:oklch(1 0 0);
--vibeui-textarea-004-fg:oklch(0.22 0.014 265);
--vibeui-textarea-004-muted:oklch(0.55 0.014 265);
--vibeui-textarea-004-border:oklch(0.9 0.006 265);
--vibeui-textarea-004-field:oklch(0.985 0.002 265);
--vibeui-textarea-004-bar:oklch(0.97 0.003 265);
--vibeui-textarea-004-accent:oklch(0.55 0.19 262);
--vibeui-textarea-004-font:ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
--vibeui-textarea-004-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
[data-vibeui-block="textarea-004"]{
display:flex;flex-direction:column;gap:0.375rem;
width:100%;max-width:23rem;box-sizing:border-box;padding:0.875rem;
background:var(--vibeui-textarea-004-bg);
border:1px solid var(--vibeui-textarea-004-border);border-radius:0.875rem;
font-family:var(--vibeui-textarea-004-font);color:var(--vibeui-textarea-004-fg);
}
[data-vibeui-block="textarea-004"] [data-part="label"]{font-size:0.8125rem;font-weight:600}
[data-vibeui-block="textarea-004"] [data-part="shell"]{
display:flex;flex-direction:column;
border:1px solid var(--vibeui-textarea-004-border);border-radius:0.625rem;overflow:hidden;
transition:border-color .16s ease,box-shadow .16s ease;
}
[data-vibeui-block="textarea-004"] [data-part="shell"]:focus-within{
border-color:var(--vibeui-textarea-004-accent);
box-shadow:0 0 0 3px color-mix(in oklab,var(--vibeui-textarea-004-accent) 18%,transparent);
}
/* Панель — настоящая toolbar с ролью: кнопки объявляются группой, а не
   набором случайных кнопок над полем. */
[data-vibeui-block="textarea-004"] [data-part="toolbar"]{
display:flex;align-items:center;gap:0.125rem;
padding:0.25rem;background:var(--vibeui-textarea-004-bar);
border-bottom:1px solid var(--vibeui-textarea-004-border);
}
[data-vibeui-block="textarea-004"] button{
appearance:none;cursor:pointer;flex:none;
min-width:1.75rem;height:1.75rem;padding:0 0.375rem;
border:0;border-radius:0.375rem;background:transparent;color:inherit;
font:inherit;font-size:0.8125rem;line-height:1;
transition:background-color .16s ease;
}
[data-vibeui-block="textarea-004"] button:hover{background:color-mix(in oklab,var(--vibeui-textarea-004-accent) 12%,transparent)}
[data-vibeui-block="textarea-004"] button:focus-visible{outline:2px solid var(--vibeui-textarea-004-accent);outline-offset:-2px}
[data-vibeui-block="textarea-004"] [data-part="bold"]{font-weight:800}
[data-vibeui-block="textarea-004"] [data-part="italic"]{font-style:italic;font-family:Georgia,"Times New Roman",serif}
[data-vibeui-block="textarea-004"] [data-part="code"]{font-family:var(--vibeui-textarea-004-mono);font-size:0.75rem}
[data-vibeui-block="textarea-004"] [data-part="sep"]{
width:1px;height:1rem;margin:0 0.25rem;flex:none;
background:var(--vibeui-textarea-004-border);
}
[data-vibeui-block="textarea-004"] textarea{
box-sizing:border-box;width:100%;min-height:6rem;resize:vertical;
margin:0;padding:0.625rem 0.75rem;border:0;
background:var(--vibeui-textarea-004-field);color:inherit;
font:inherit;font-size:0.875rem;line-height:1.55;
}
[data-vibeui-block="textarea-004"] textarea:focus{outline:none}
[data-vibeui-block="textarea-004"] [data-part="hint"]{
margin:0;font-size:0.75rem;color:var(--vibeui-textarea-004-muted);
}
[data-vibeui-block="textarea-004"] code{
font-family:var(--vibeui-textarea-004-mono);font-size:0.6875rem;
padding:0.0625rem 0.25rem;border-radius:0.25rem;
background:var(--vibeui-textarea-004-bar);
}
@media (prefers-reduced-motion:reduce){[data-vibeui-block="textarea-004"] *{animation:none!important;transition:none!important}}
`

const TOOLS = [
  { part: "bold", wrap: "**", caption: "B", title: "Полужирный" },
  { part: "italic", wrap: "_", caption: "I", title: "Курсив" },
  { part: "code", wrap: "`", caption: "</>", title: "Код" },
]

const START =
  "Компонент ставится **одной командой** и не тянет зависимости.\nВнутри — обычный `textarea`."

/**
 * Поле с панелью форматирования: кнопки оборачивают выделение через setRangeText.
 * Один файл, ноль зависимостей, собственная палитра.
 */
export function Textarea004({
  label = "Описание релиза",
  placeholder = "Что изменилось в этой версии",
  hint = "Поддерживается разметка markdown",
  accent,
  className,
  style,
  ...props
}: Textarea004Props) {
  const id = useId()
  const field = useRef<HTMLTextAreaElement>(null)
  const [value, setValue] = useState(START)

  const wrap = (marks: string) => {
    const element = field.current
    if (!element) {
      return
    }
    const { selectionStart, selectionEnd } = element
    // setRangeText, а не сборка новой строки: так браузер сохраняет
    // собственную историю отмены и Ctrl+Z продолжает работать.
    element.setRangeText(marks, selectionEnd, selectionEnd, "end")
    element.setRangeText(marks, selectionStart, selectionStart, "start")
    element.setSelectionRange(
      selectionStart + marks.length,
      selectionEnd + marks.length,
    )
    element.focus()
    setValue(element.value)
  }

  const prefixLines = (marks: string) => {
    const element = field.current
    if (!element) {
      return
    }
    const start =
      element.value.lastIndexOf("\n", element.selectionStart - 1) + 1
    element.setRangeText(marks, start, start, "end")
    element.focus()
    setValue(element.value)
  }

  const palette = {
    ...(accent ? { "--vibeui-textarea-004-accent": accent } : null),
    ...style,
  } as CSSProperties

  return (
    <>
      <style href="vibeui-textarea-004" precedence="medium">
        {STYLES}
      </style>
      <div
        {...props}
        data-vibeui-block="textarea-004"
        className={className}
        style={palette}
      >
        <label data-part="label" htmlFor={id}>
          {label}
        </label>
        <div data-part="shell">
          <div data-part="toolbar" role="toolbar" aria-label="Форматирование">
            {TOOLS.map((tool) => (
              <button
                key={tool.part}
                type="button"
                data-part={tool.part}
                title={tool.title}
                aria-label={tool.title}
                onClick={() => wrap(tool.wrap)}
              >
                {tool.caption}
              </button>
            ))}
            <span data-part="sep" aria-hidden="true" />
            <button
              type="button"
              data-part="list"
              title="Маркированный список"
              aria-label="Маркированный список"
              onClick={() => prefixLines("- ")}
            >
              •—
            </button>
          </div>
          <textarea
            id={id}
            ref={field}
            value={value}
            placeholder={placeholder}
            onChange={(event) => setValue(event.target.value)}
          />
        </div>
        <p data-part="hint">
          {hint}: <code>**жирный**</code>, <code>_курсив_</code>
        </p>
      </div>
    </>
  )
}