Deno dynamic import("./exports") throws module not found for "exports.js" dynamically created in the script

dynamic_import_always_throws.js

// Deno dynamic import("./exports") throws module not found for "exports.js" dynamically created in the script
// dynamic_import_always_throws.js
// References: https://www.reddit.com/r/Deno/comments/18unb03/comment/kfsszsw/ https://github.com/denoland/deno/issues/20945
// Usage:
// deno run -A dynamic_import_always_throws.js
// bun run dynamic_import_always_throws.js
// node --experimental-default-type=module dynamic_import_always_throws.js
import { open, unlink } from "node:fs/promises";
const runtime = navigator.userAgent;
const encoder = new TextEncoder();
try {
  const script = `export default 1;`;
  // deno
  if (runtime.includes("Deno")) {
    await Deno.writeFile("exports.js", encoder.encode(script));
  }
  // node
  if (runtime.includes("Node")) {
    const dynamic = await open("./exports.js", "w");
    await dynamic.write(script);
    await dynamic.close();
  }
  // bun
  if (runtime.includes("Bun")) {
    await Bun.write("exports.js", encoder.encode(script));
  }
  const { default: module } = await import("./exports.js"); // Raw string specifier
  console.log({ module });
  console.log({ runtime });
} catch (e) {
  console.log("Deno always throws.");
  console.log({ runtime });
  console.trace();
  console.log(e.stack);
} finally {
  console.log("Finally");
  // node, bun
  if (runtime.includes("Node") || runtime.includes("Bun")) {
    await unlink("./exports.js");
  } // deno
  else if (runtime.includes("Deno")) {
    await Deno.remove("./exports.js");
  }
}