How would you allow running the fetches in

    fetch /some-url as json
    fetch /some-other-url as json

    do_stuff_with(result1, result2)

in parallel?

hyperscript is focused on the common cases for light front end scripting, so right now there isn't syntax for doing operations in parallel.

If I needed that I would kick out to javascript and use Promise.all() to return an expression that hyperscript could then sync on

the wheelhouse for hyperscript is stuff like:

  on load
    wait 5s
    transition my opacity to 0
    remove me

where you don't have to do any async or callback stuff for what are, at root, async operations.

I don't get it then; your fix to promises being complicated is to remove the ability to perform asynchronous actions. That's cool for a small scripting language I guess, but absolutely impractical for anything serious.

hyperscript is designed for small, embedded front end scripting needs: toggling classes, listening for events from its sister project, https://htmx.org, etc. It isn't a general purpose programming language for use, for example, on the server side in a node-like environment.

you can still perform things asynchronously by wrapping any expression or command in an `async` prefix:

https://hyperscript.org/commands/async/

but there isn't a mechanism for resolving all of them

although, now, come to think of it, the following would work:

  set results to {result1: somethingThatReturnsAPromise(), result2: somethingElseThatReturnsAPromise()}

That would work out because under the covers the hyperscript runtime calls a Promise.all() on those field values before it continues. Kind of a hack, but it would work.

Anyway, again, hyperscript is a DSL targeted at small front end scripting needs rather than being a large scale concurrent systems programming language.