iframe being rendered strangely in the canvas view

公式デモでカスタムコードブロックを使って iframe の動作を再現し、次に canvas view と view code modal、editor.getHtml() を比較します。canvas が iframe を div に置き換え、その属性を移動している箇所を追跡します。完了条件は、canvas が iframe のレイアウトを保持し、モデルの出力との一貫性を維持することです。

Hello,

The issue described below can be reproduced on the official demo at https://grapesjs.com/demo.html

When I try to add an iframe in a custom code block, the view tends to replace the iframe by a div, which breaks the layout of the iframe. However, the model seems to have the correct iframe since it is shown correctly in the view code modal, or by using editor.getHtml().

For example, if I add this iframe which is an embed YouTube video:

<iframe width="560" height="315" src="https://www.youtube-nocookie.com/embed/dQw4w9WgXcQ?si=m6l8dvLYog_PS9a4" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe>

This is what the canvas view will use, parts of the iframe attributes are now on a parent div:

<div data-gjs-highlightable="true" id="i73h" data-gjs-type="custom-code" draggable="true">
  <div id="i5xd" data-gjs-type="video" draggable="true" allowfullscreen="" width="560" height="315" src="https://www.youtube-nocookie.com/embed/dQw4w9WgXcQ?si=m6l8dvLYog_PS9a4" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" class="gjs-hovered">
    <iframe src="https://www.youtube-nocookie.com/embed/dQw4w9WgXcQ?" frameborder="0" allowfullscreen="true" class="gjs-no-pointer" style="height: 100%; width: 100%;"></iframe>
  </div>
</div>