next.js/examples/cms-makeswift/lib/makeswift/register-components.tsx

import { Style } from "@makeswift/runtime/controls";
import { ReactRuntime } from "@makeswift/runtime/react";

// Register your components here!

function HelloWorld(props: { className?: string }) {
  return <p {...props}>Hello, world!</p>;
}

ReactRuntime.registerComponent(HelloWorld, {
  type: "hello-world",
  label: "Hello, world!",
  props: {
    className: Style({ properties: Style.All }),
  },
});