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

This can be done with CSS only!

Please check my answer to this similar question:

https://stackoverflow.com/a/25462829/1077230

I don't want to double post my answer but the short of it is that the parent needs to become a flexbox element. Eg:

(only using the webkit vendor prefix here.)

#main {
    display: -webkit-box;
    display: -webkit-flex;
    display: flex;
    -webkit-box-orient: vertical;
    -webkit-flex-direction: column;
    flex-direction: column;
    -webkit-box-align: start;
    -webkit-align-items: flex-start;
    align-items: flex-start;
}

Then, swap divs around by indicating their order with:

#main > div#one{
    -webkit-box-ordinal-group: 2;
    -moz-box-ordinal-group: 2;
    -ms-flex-order: 2;
    -webkit-order: 2;
    order: 2;
    overflow:visible;
}

#main > div#two{
    -webkit-box-ordinal-group: 1;
    -moz-box-ordinal-group: 1;
    -ms-flex-order: 1;
    -webkit-order: 1;
    order: 1;
}