Aspect Ratio — logic2b/ui

16 / 9

import { AspectRatio } from "@/components/ui/aspect-ratio"

export default function AspectRatioDemo() {
  return (
    <AspectRatio
      ratio={16 / 9}
      className="bg-muted flex items-center justify-center rounded-md"
    >
      <span className="text-muted-foreground text-sm">16 / 9</span>
    </AspectRatio>
  )
}

Installation

npx logic2b@next add aspect-ratio

Working with an AI assistant? Copy this prompt into Claude Code, Cursor or Copilot — it carries the install steps, a no-CLI fallback and a verification checklist.

Add the "aspect-ratio" item from the logic2b ui registry (https://ui.logic2b.com) to this project. Follow every step and verify at the end.

## Steps

1. If the project has no `components.json` yet, set up logic2b ui first:

   ```bash
   npx logic2b@next init
   ```

2. Install the item (the CLI resolves registry dependencies automatically):

   ```bash
   npx logic2b@next add aspect-ratio
   ```

3. Install any npm dependencies the command prints.

## If the CLI is not available

Do it manually from the registry payload:

1. Fetch https://ui.logic2b.com/r/aspect-ratio.json.
2. Write every entry in `files[]` to its mapped project path (see below).
3. Repeat (recursively) for each name in `registryDependencies`.
4. Install every package listed in `dependencies` across those payloads.

## Registry reference

- Index of every item: https://ui.logic2b.com/r/index.json
- Item payload (full source): https://ui.logic2b.com/r/<name>.json
- Usage examples per item: https://ui.logic2b.com/r/demos/index.json → https://ui.logic2b.com/r/demos/<demo>.json
- Docs index for agents: https://ui.logic2b.com/llms.txt (full docs: https://ui.logic2b.com/llms-full.txt)
- Every docs page is Markdown when you append `.md` to its URL.

Registry file paths map to project paths like this:
- `ui/*` → `@/components/ui/*`
- `blocks/<name>/*` → `@/components/*`
- `charts/*` → `@/components/charts/*`
- `hooks/*` → `@/hooks/*`
- `lib/utils.ts` → `@/lib/utils.ts`
- `theme.css` → next to the project's Tailwind entry stylesheet

## Conventions (do not break these)

- Tailwind CSS v4 (CSS-first config; no tailwind.config.js needed) and React 19.
- All colors go through semantic tokens (`bg-primary`, `text-muted-foreground`,
  `border-border`, …). Never hardcode hex/oklch values in components.
- Dark mode is class-based: toggle `.dark` on `<html>`.
- Icons come from lucide-react.

## Verify before finishing

1. The dev server starts and the app renders without console errors.
2. TypeScript compiles (`tsc --noEmit` or the framework's check).
3. Components use the theme: a `<Button>` shows the primary token color,
   and toggling `.dark` on `<html>` switches the palette.

Install the dependencies:

npm install radix-ui

Copy into ui/aspect-ratio.tsx:

"use client"

import * as React from "react"
import { AspectRatio as AspectRatioPrimitive } from "radix-ui"

function AspectRatio({
  ...props
}: React.ComponentProps<typeof AspectRatioPrimitive.Root>) {
  return <AspectRatioPrimitive.Root data-slot="aspect-ratio" {...props} />
}

export { AspectRatio }

Usage

import { AspectRatio } from "@/components/ui/aspect-ratio"

<AspectRatio ratio={16 / 9}>
  <img src="..." alt="Image" className="rounded-md object-cover" />
</AspectRatio>

Usage notes

Also accepts any standard div props, which are forwarded to the wrapper.

Examples

Square

1 / 1

import { AspectRatio } from "@/components/ui/aspect-ratio"

export default function AspectRatioSquareDemo() {
  return (
    <div className="w-48">
      <AspectRatio
        ratio={1}
        className="bg-muted flex items-center justify-center rounded-md"
      >
        <span className="text-muted-foreground text-sm">1 / 1</span>
      </AspectRatio>
    </div>
  )
}

Portrait

3 / 4

import { AspectRatio } from "@/components/ui/aspect-ratio"

export default function AspectRatioPortraitDemo() {
  return (
    <div className="w-40">
      <AspectRatio
        ratio={3 / 4}
        className="bg-muted flex items-center justify-center rounded-md"
      >
        <span className="text-muted-foreground text-sm">3 / 4</span>
      </AspectRatio>
    </div>
  )
}

Live playground

Edit the component props and inspect the exact JSX before copying it. The preview loads only when this section enters the viewport.

Generated JSX

<AspectRatio
  ratio={1.7778}
  className="flex items-center justify-center rounded-lg bg-muted text-sm text-muted-foreground"
>Responsive media</AspectRatio>

API reference

Generated from the public TypeScript exports in src/ui/aspect-ratio.tsx.

View JSON

AspectRatio

Component

Props: React.ComponentProps<typeof AspectRatioPrimitive.Root>

Accessibility contract

Machine-readable behavior and consumer responsibilities for aspect-ratio.

View JSON

Support: Composition contract
Pattern: layout wrapper; Radix Aspect Ratio

Built-in semantics

Adds no semantic role and preserves the accessibility tree of its child content.

Consumer responsibilities

Give contained images, videos and embeds their own accessible names or captions.