ByteDance Web Infra

Jul 30, 2025 · Backend Development

How to Resolve FalseEsm and FalseCjs Type Errors When Moving to ESM‑Only

This article explains why sharing a single .d.ts file between ESM and CJS can cause FalseEsm and FalseCjs type errors, shows how recent Node and TypeScript updates mitigate the issue, and provides practical solutions such as generating separate .d.cts files or using TS 5.8 with "module": "nodenext".