Wojciech Czerniak

[Key Concepts](https://handsontable.github.io/hyperformula/guide/key-concepts.html) will be a good start to understand how HyperFormula works with AST. I would start with Evaluator or Interpreter, who calls function and when. Then go from there...

> > Async and non async > > Both function types should work. Preferably without changing everything to automatically resolved promises. We need to discover when function is async or...

> > Error handling > > What will happen if one of the promises is rejected? We need a new ErrorType, and ErrorCode. But most importantly, we need to make...

> Retries - Need clarification if @handsontable/devs actually want this or not > Circuit breaker - Need clarification if @handsontable/devs actually want this or not IMO `timeout` is enough of...

What do you mean by that? Can you add more context?

No, HF does not support this currently. WASM modules are run asynchronous so this would require implementing async UDFs first and is blocked by #9 A very good idea tho,...

Please use the newer version of the spec: https://docs.oasis-open.org/office/OpenDocument/v1.3/csprd02/part4-formula/OpenDocument-v1.3-csprd02-part4-formula.html#__RefHeading__1017966_715980110

Blocked by #15. Needed only for union reference, when union result is empty.

⚠️ I found an issue #469 that suggest removing the spaces instead adding them. Should be examined carefully

I second that that there should be no spaces as default. But instead introducing flags I would focus on #515 to allow the necessary customizations for even more extensions than...