iterate object properties

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

    <script type="text/hyperscript">
      init
        set $o to { name: "john", age: 30 }
        for value in $o index key
          log key
          log value
        end
      end
    </script>

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
    <anonymous> https://unpkg.com/hyperscript.org:1
    <anonymous> 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.

Empieza reproduciendo el snippet de HTML hyperscript del issue con el objeto que contiene name y age, y después inspecciona cómo el for-loop existente gestiona su entrada. Confirma cómo deben exponer las propiedades del objeto key y value, y considera terminado el trabajo cuando el ejemplo itere sin el TypeError indicado y registre ambas propiedades.