Aspect ratio.

Keep things in proportion.

In practice

Use ratio (defaults to 16/9). Place responsive content inside. Invalid or negative ratios should not be supplied.

Installation

Install Coal once. Components and TypeScript declarations are included. React 19 and React DOM 19 are peer dependencies.

npm install http://localhost:3100/downloads/chlohal-coal-ui-0.5.0.tgz

This installs the local package. It is not yet published on npm. See installation for stylesheet setup and integration.

Usage

"use client";
import * as React from "react";
import "@chlohal/coal-ui/styles.css";
import { AspectRatio } from "@chlohal/coal-ui";
export default function Example() {
    return (<AspectRatio ratio={16 / 9}>
          <span>
            16 : 9
          </span>
        </AspectRatio>);
}

Source

The original Coal implementation. Use the package export to integrate it.

import * as React from "react";
export function AspectRatio({
  ratio = 16 / 9,
  style,
  ...props
}: React.ComponentPropsWithRef<"div"> & { ratio?: number }) {
  return (
    <div
      style={{ aspectRatio: ratio > 0 ? ratio : 16 / 9, ...style }}
      {...props}
    />
  );
}

Accessibility checklist

• Provide an accessible name for controls, including icon-only buttons.
• Check keyboard navigation, visible focus and disabled states in your application.
• Do not rely on color alone to communicate status.