TS7: `@extends` is ignored when the heritage is a call expression (Base.extend())

[NullVoxPopuli]

🔎 搜索 Terms

extends js TS7 jsdoc

nothing seemed directly related

🕗 Version & Regression Information

"typescript-7": "npm:typescript@7.1.0-dev.20260826.1"

⏯ Playground Link

https://github.com/NullVoxPopuli-ai-agent/typescript-go-jsdoc-extends-call-heritage

💻 Code

https://github.com/NullVoxPopuli-ai-agent/typescript-go-jsdoc-extends-call-heritage

// @ts-check

/**
 * @template T
 */
class Base {
  /** @returns {T} */
  get value() {
    throw new Error();
  }
  /** @returns {typeof Base} */
  static extend() {
    return this;
  }
}

/** @extends {Base<string>} */
class ViaCall extends Base.extend() {}

/** @extends {Base<string>} */
class ViaIdentifier extends Base {}

/** @type {string} */
const a = new ViaIdentifier().value; // ok in both

/** @type {string} */
const b = new ViaCall().value; // error in TS 7 only

🙁 Actual behavior

Version 7.1.0-dev.20260826.1
repro.js:18:23 - error TS8026: Expected Base<T> type arguments; provide these with an '@extends' tag.

18 class ViaCall extends Base.extend() {}
                         ~~~~~~~~~~~~~


Found 1 error in repro.js:18

🙂 Expected behavior

no error in TS7

Additional information about the issue

No response