React Component Dev

React Component Development — Skill

Name: react-component-dev Purpose: Build reusable, accessible React components with predictable APIs and ref forwarding. Use this skill when creating or refactoring components.

Applies when: Building new components, refactoring UI components, or defining component APIs. Do not use when: Only editing styles or content in existing components without API changes.

Rules

• Composition over configuration: Prefer children/slots over many boolean props.
• Forward refs: If a component renders a DOM element, use forwardRef.
• Accessibility: Use semantic HTML first; add ARIA only when needed.
• Predictable props: Follow controlled/uncontrolled conventions.
• Small and testable: Extract complex behavior into hooks.

Workflow

1. Define the component’s responsibility and minimal usage.
2. Choose the API shape (controlled vs uncontrolled as needed).
3. Implement with semantic HTML and accessibility defaults.
4. Add forwardRef for DOM-rendering components.
5. Extract complex behavior into hooks if needed.

Checklists

Implementation checklist

• Component has a single responsibility
• DOM components forward refs
• Semantic HTML used
• Keyboard interaction works
• Props follow React conventions

Review checklist

• API is small and composable
• Example usage is included

Minimal examples

forwardRef pattern

import * as React from "react";

type ButtonProps = React.ButtonHTMLAttributes<HTMLButtonElement> & {
  variant?: "default" | "ghost";
};

export const Button = React.forwardRef<HTMLButtonElement, ButtonProps>(
  ({ variant = "default", className, ...props }, ref) => {
    return (
      <button
        ref={ref}
        className={[
          variant === "ghost" ? "bg-transparent" : "bg-black text-white",
          className,
        ]
          .filter(Boolean)
          .join(" ")}
        {...props}
      />
    );
  },
);
Button.displayName = "Button";

Compound component

export function Card({ children }: { children: React.ReactNode }) {
  return <div className="rounded-lg border p-4">{children}</div>;
}
export function CardHeader({ children }: { children: React.ReactNode }) {
  return <div className="mb-2 font-semibold">{children}</div>;
}
export function CardBody({ children }: { children: React.ReactNode }) {
  return <div>{children}</div>;
}

Common mistakes / pitfalls

• Missing forwardRef on input-like components
• Using div for buttons/links
• Overloading components with boolean props
• Shipping components without a minimal usage example