esmoduleinterop: Improve error message when calling static method on class

Description

declare class C { static m(): void }
declare namespace C {}
export = C;

import * as C from "./b";
C.m();

src/a.ts(1,1): error TS7038: A namespace-style import will import a module namespace object, not a class.
src/a.ts(2,3): error TS2339: Property 'm' does not exist on type 'typeof C'.

Contributor guide

Tech stack

typescriptjavascript

Domain

developer experience

Issue type

feature

DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.

3

Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.

1-3 hours

Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.

stale

ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.

clear

Prerequisites

TypeScript compiler internalsES modules interopError message format

Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.

65

Research direction

Look at the TypeScript compiler source code, likely in src/compiler/checker.ts or related files, to find where error TS7038 is thrown. Investigate how to detect when a namespace import is used for a class and add an additional error message before the existing TS2339. The issue discussion indicates that the first error should guide the user. No existing PRs were found.