ts-r
  • Error
  • Reported by the type checker

TS2315

Type '{0}' is not generic.

Type arguments are given to a type that has no type parameters. Remove them, or make the type generic.

What it means

Only generic types accept <...> arguments. Writing User<string> when User declares no type parameters is reported here.

Example

index.ts
interface User {
  name: string;
}

export const u: User<string> = { name: "a" };
ts-r-check -p tsconfig.json --pretty false ts-r output
index.ts(5,17): error TS2315: Type 'User' is not generic.

Recorded by node scripts/verify-examples.mjs with ts-r built from commit 6deaf01. The example uses the default tsconfig: strict, target: es2022, module: esnext, moduleResolution: bundler.

How to fix

  • Remove the type arguments.
  • Or add a type parameter to the declaration if it should be generic.