iterate object properties

首先，使用包含 name 和 age 的对象复现 issue 中的 HTML hyperscript 代码片段，然后检查现有 for-loop 如何处理其输入。确认对象属性应如何公开 key 和 value，并在示例迭代时不再出现报告的 TypeError 且记录两个属性后，将工作视为完成。

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.