iterate object properties

I tried something that was not documented: "Iterate over an object"
code:
```

init
set $o to { name: "john", age: 30 }
for value in $o index key
log key
log value
end
end

```

But I could not get it working. Trying multiple methods, most of them resulted into an error.
console:
```
Uncaught TypeError: i.iterator is undefined
op https://unpkg.com/hyperscript.org:1
unifiedEval https://unpkg.com/hyperscript.org:1
unifiedExec https://unpkg.com/hyperscript.org:1
execute https://unpkg.com/hyperscript.org:1
o https://unpkg.com/hyperscript.org:1
setTimeout handler*install https://unpkg.com/hyperscript.org:1
apply https://unpkg.com/hyperscript.org:1
initElement https://unpkg.com/hyperscript.org:1
processNode https://unpkg.com/hyperscript.org:1
forEach https://unpkg.com/hyperscript.org:1
processNode https://unpkg.com/hyperscript.org:1
w https://unpkg.com/hyperscript.org:1
n https://unpkg.com/hyperscript.org:1
w https://unpkg.com/hyperscript.org:1
promise callback*w https://unpkg.com/hyperscript.org:1
https://unpkg.com/hyperscript.org:1
https://unpkg.com/hyperscript.org:1
```
Since this works in normal javascript I think there must be a way to do this in hyperscript.
Please let me know how to do this.