ts-r
  • Error
  • Reported by the type checker

TS1070

'{0}' modifier cannot appear on a type member.

A modifier such as `public` or `static` is used on a member of an interface or type literal. Type members cannot have these modifiers.

What it means

Interfaces and type literals describe shapes; their members have no visibility and are never static. Of the modifiers, only readonly is allowed on a type member. Accessibility, static, abstract, async, export, declare and override are reported here.

Example

index.ts
export interface Point {
  public x: number;
}
ts-r-check -p tsconfig.json --pretty false ts-r output
index.ts(2,3): error TS1070: 'public' modifier cannot appear on a type member.

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

  • Delete the modifier: x: number.
  • If you need private or static members, use a class.