渲染所有可能的元素或根据请求渲染

So I have an app that has a right sidebar whose visibility is toggled via a button. In that sidebar there can be one of several things [at a time] - chat, help, search. I was looking at some plain HTML from apps which have a similar feature and noticed that they have all nodes rendered, but are just hidden via CSS.So I have an app that has a right sidebar whose