# P button 19

> Expandable show more/less toggle button

A shadcn/ui block from the [@coss](https://coss.com/ui) registry, listed on [shadcn.exchange](https://shadcn.exchange/r/coss/p-button-19).

- Page, with a live preview: https://shadcn.exchange/r/coss/p-button-19
- Screenshot: https://abzjhwgwpdpz7ua5.public.blob.vercel-storage.com/shots/coss/p-button-19-light-29632fdbcdaf8500.png
- Registry item: https://coss.com/ui/r/p-button-19.json
- Categories: button
- Listed: 2026-10-13, source last changed 2026-10-13

## Install

```bash
npx shadcn@latest add https://coss.com/ui/r/p-button-19.json
```

Run it in a project that has shadcn/ui set up. It adds the files below and installs what they depend on.

## Dependencies

- npm packages: `lucide-react`
- Registry items: `@coss/button`

## Files

### `registry/default/particles/p-button-19.tsx`

```tsx
"use client";

import { ChevronDownIcon, ChevronUpIcon } from "lucide-react";
import { useState } from "react";
import { Button } from "@/registry/default/ui/button";

export default function Particle() {
  const [isExpanded, setIsExpanded] = useState<boolean>(false);

  const toggleExpand = () => {
    setIsExpanded((prevState) => !prevState);
  };

  return (
    <Button
      aria-controls="expandable-content"
      aria-expanded={isExpanded}
      className="gap-1"
      onClick={toggleExpand}
      variant="ghost" // Use this ID on the element that this button controls
    >
      {isExpanded ? "Show less" : "Show more"}
      {isExpanded ? (
        <ChevronUpIcon aria-hidden="true" className="-me-1" />
      ) : (
        <ChevronDownIcon aria-hidden="true" className="-me-1" />
      )}
    </Button>
  );
}
```