JS Typedef merged with default export alias behaves strangely

TypeScript Version: 3.4.0-dev.201xxxxx

Search Terms:

Code

in a TS file:

import Def from "./file.js"

type Q = Def;

console.log(Def);

with file.js:

const x = 12;
export {x as default};
/**
 * @typedef {string | number} default
 */

with checkJs and allowJs both on, the hover text for Def is surprisingly correct:

however the console.log is marked as an error, stating:

'Def' only refers to a type, but is being used as a value here.

Expected behavior:
Since the quickinfo shows it's clearly a value (and a value is, in fact, exported), the default import should be usable as a value.

Actual behavior:
The default import is not usable as a value without error.

cc @sandersn

Riproduci il problema con la configurazione TypeScript 3.4.0-dev utilizzando gli snippet .ts e .js forniti, con checkJs e allowJs abilitati. Traccia il modo in cui l’alias dell’esportazione predefinita e il JSDoc typedef denominato default vengono uniti, quindi verifica che il Def importato sia accettato in console.log mantenendo le informazioni sul tipo mostrate.