TypeScript Errors Reference

Every TypeScript error code explained with real examples and fixes. Search by error code or message to find exactly what you need.

A TypeScript error message has two parts: the code (like TS2345) tells you the category of problem, and the message tells you which types are involved. The reference covers the errors you will actually hit day to day — assignability problems, null and undefined checks, missing properties, and implicit any. Each page explains what the compiler is complaining about, shows the mistake in real code, and walks through the idiomatic fix. When you are done fixing, the best way to stop hitting the same error again is to practice with TypeScript challenges built around it.