There are some interesting changes in <2.4.0-Beta1...

# javascript

[Edoardo Luppi]

There are some interesting changes in 2.4.0-Beta1.
Seems like ES2015 syntax can finally be used in js("...") (probably the only missing piece is the ** operator), and there was a lot of progress on Analysis API-based exportability, which is required for KDoc to JSDoc.

- https://youtrack.jetbrains.com/issue/KT-84090 Save variance in the generated TypeScript
- https://youtrack.jetbrains.com/issue/KT-82128 [K/JS] Allow named companion objects in exported interfaces

- https://youtrack.jetbrains.com/issue/KT-83452 K/JS: Support ES6 array destructuring in js() calls
- https://youtrack.jetbrains.com/issue/KT-83451 K/JS: Support ES6 object destructuring in js() calls
- https://youtrack.jetbrains.com/issue/KT-84647 K/JS: Class expressions are not supported in js() calls

- https://youtrack.jetbrains.com/issue/KT-84458 KJS: Fully support @JsStatic in Analysis API-based TypeScript Export
- https://youtrack.jetbrains.com/issue/KT-84454 KJS: Generate protected overrides for abstract class inheritors in Analysis API-based TypeScript Export
- https://youtrack.jetbrains.com/issue/KT-84490 KJS: Fix mutability of exported top-level variables Analysis API-based TS export with ES modules
- https://youtrack.jetbrains.com/issue/KT-84459 KJS: Support default exportability in Analysis API-based TypeScript Export
- https://youtrack.jetbrains.com/issue/KT-84456 KJS: Support deprecation comments in Analysis API-based TypeScript export
- https://youtrack.jetbrains.com/issue/KT-82264 Implement exporting classes in Analysis API-based TypeScript Export

[Artem Kobzar]

Isn't exponential operator (**) presented in ES2016?

[Edoardo Luppi]

Ah yup! You're right https://en.wikipedia.org/wiki/ECMAScript_version_history#7th_edition_%E2%80%93_ECMAScript_2016

I got confused because KT-60221 is a subtask of KT-21626.