null vs undefined

[mmoskal]

ES has two "none" values null and undefined. Should we unify them?

There is little runtime overhead either way, but we have to decide.

[mmoskal]

We stick to ES semantics.

[pelikhan]

@mmoskal can you start a page in the docs documentating all these subtle differences?

[mmoskal]

for reference: https://github.com/microsoft/devicescript/blob/main/website/docs/Language/ds-vs-js.md