TS1192: Module has no default export - in CI

By Kaveh Alemi·Latchkey

You used a default import on a module that exports only named members (or a CommonJS module without interop).

What this error means

Type-checking fails with TS1192 naming the module that lacks a default export.

src/app.ts(1,8): error TS1192: Module '"./helpers"' has no default export.

Common causes

How to fix it

Use a named import

1. Import the named member instead of a default

import { helper } from './helpers'

Enable esModuleInterop for CJS defaults

1. Turn on esModuleInterop so synthetic default imports work for CommonJS

{
  "compilerOptions": { "esModuleInterop": true }
}

How to prevent it

• Match import style to the module shape and enable esModuleInterop when consuming CommonJS.

Frequently asked questions

Related guides

References

• Node.js documentation
• npm CLI documentation
• GitHub Actions documentation