**require‑esm‑deasync** is a small Node.js utility that lets you `require()` ES 6 modules synchronously in a CommonJS script by catching the “ERR_REQUIRE_ESM” error, performing a dynamic `import()`, and blocking the thread with the `deasync` library. It’s intended for developers—especially those writing simple test files—who need a quick workaround for ES‑module dependencies during development, and it is explicitly not recommended for production use.