Interface no I prefix (ARCH3003)

Key typescript.naming.interface-no-i-prefix · Severity info · Category naming

Interfaces should not be prefixed with I. This C# habit is discouraged by the TypeScript Handbook; the type system already distinguishes interfaces from classes.

Incorrect

interface IUserService {
  findById(id: number): User;
}

interface IRepository<T> {
  save(entity: T): void;
}

Correct

interface UserService {
  findById(id: number): User;
}

interface Repository<T> {
  save(entity: T): void;
}

Fix

Drop the I prefix and name the interface directly after the concept it models.