ts-r
  • Error
  • Reported by the type checker

TS4127

This member cannot have an 'override' modifier because its name is dynamic.

A member with a computed (dynamic) name has the override modifier. Remove override, or use a literal name.

What it means

The checker can't tell which base class member a computed name like [key] refers to, so it doesn't allow override on it.

Example

index.ts
const key: string = "run";
class Base {}
class Child extends Base {
  override [key]() {}
}
export {};
ts-r-check -p tsconfig.json --pretty false ts-r output
index.ts(4,12): error TS4127: This member cannot have an 'override' modifier because its name is dynamic.

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 override from the member.
  • Or use a literal name so the override can be checked.