Seperate html files for desktop web build

I would be interested too, something between design and tech. “officially” the only thing which pop up in my mind would be the blog post about SplitPane

P.S.: What I could share regarding this particular subject is the following css:

.big-screen-content {
  @media only screen and (min-width: 540px) {
      margin: auto;
      width: 80%;
  }
}

I use it in my pages in order to shrink the content so it looks a little bit less wide, more compact. like

<ion-content>
  <div class="big-screen-content">

or

<ion-content>
   <ion-slide class="big-screen-content">

etc.