[ts-beta 5.5] Function declarations are not exported when targeting commonJS - js emit regression

[dragomirtitian]

🔎 Search Terms

JavaScript emit commonjs

🕗 Version & Regression Information

• This changed between versions 5.4 and 5.5beta

⏯ Playground Link

Playground Link

💻 Code

function getProgram(source: string) {}
export { getProgram }

🙁 Actual behavior

The following js is generated:

Object.defineProperty(exports, "__esModule", { value: true });
exports.getProgram = void 0;
function getProgram(source) { }

This does not actually add the function to the export. So when importing getProgram it will be undefined.

🙂 Expected behavior

Emit should be the same as 5.4 where the function is actually exported:

Object.defineProperty(exports, "__esModule", { value: true });
exports.getProgram = void 0;
function getProgram(source) { }
exports.getProgram = getProgram;

Additional information about the issue

This seems to affect only function declarations. Variables, classes seem to be exported correctly.

[Andarist]

I think a fix for this was merged just yesterday: #58489 , for some reason playground doesn't recognize the latest nightly (5.5.0-dev.20240529), cc @jakebailey

[jakebailey]

The CI got cancelled and screwed with things, manually fixing it right now

[jakebailey]

Website should be okay now

[Andarist]

and the playground confirms that this is fixed: TS playground :)