| 5 | | The `<iframe src="update.php?action=update-selected&plugins={plugin-files-here}&_wpnonce={nonce-here}" style="width: 100%; height: 100%; min-height: 750px;" frameborder="0" title="Update progress"></iframe>` is just never shown until the updates are done. It does actually use the space in the HTML but its contents are not shown. Only once the process is done, the contents are shown. |
| 6 | | |
| 7 | | It appears to me the iframes' body is simply empty, until the updates are done. |
| | 5 | The `<iframe src="update.php?action=update-selected&plugins={plugin-files-here}&_wpnonce={nonce-here}" style="width: 100%; height: 100%; min-height: 750px;" frameborder="0" title="Update progress"></iframe>` body is simply empty, until the updates are done. It does actually use the space in the HTML but its contents are not shown (`body` is empty). Only once the process is done, the contents are shown. |