dynamic colspan for resource form

Hi, I wonder is there any dynamic way to set form colspan, the scenario is like we have 2 or 3 column form and when we click a button/action the colspan become 1, it would be usefull if we use Richtext for editing the content

Solution

hidden field with default value, then fn($get) => $get('hidden_field') in the colspan and get the hidden field value. then in the action set the hidden field value