figma_fetch.tsx

import {
  defineProperties,
  useEffect,
  useState,
} from "figma:react";

export default function Layer({ text }) {
  const [data, setData] = useState([]);
  useEffect(() => {
    fetch("http://localhost:3000/example").then(
      async (response) => {
        setData(await response.json());
      },
    );
  }, []);
  return (
    <div>
      {data.map((text) => (
        <p key={text}>{text}</p>
      ))}
    </div>
  );
}

defineProperties(Layer, {
  text: {
    label: "Text",
    type: "string",
    defaultValue: "Code layer",
  },
});