TS7016: Could not find a declaration file for module 'x'. 'x.js' implicitly has an 'any' type.
The JavaScript package has no TypeScript types bundled and no @types package installed.
Exact message you may see
Could not find a declaration file for moduleimplicitly has an 'any' type
Seen on:
Node.js
Meaning
With noImplicitAny/strict, untyped imports error. Install @types/package if it exists, or write a minimal declaration.
Common causes
- Package without types
- @types package not installed
- Types published under a different name
⚡ Quick fix
- npm i -D @types/package
- Add declare module 'package'; in a .d.ts file
- Check the package for a types/typings field
Detailed fix by platform
Node.js
npm i -D @types/express
How to diagnose
- Types — Does @types/name exist?
- Recent change — Did it start after a deploy, upgrade, or configuration change? Compare with the last working version.
🔧 Still not fixed?
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Last updated 15 Oct 2026