How can I reorder my divs using only CSS?

Question

Given a template where the HTML cannot be modified because of other requirements, how is it possible to display (rearrange) a div above another div

Answer 1

With CSS3 flexbox layout module, you can order divs.

#wrapper {
  display: flex;
  flex-direction: column;
}
#firstDiv {
  order: 2;
}


  

    Content1
  
  

    Content2