So, it turns out that css background-images don't get loaded until the relevant selector is triggered. As Kuchta describes it on css-only-chat's GitHub page ... make use of just CSS and HTML ...

Create a new HTML ... of the page:This removes the bullets from any list using the "myList" class. Save the page and reload in your Web browser to view the changes. Change the CSS rule:.myList ...

A web developer named Alex Giron has created a working model of the solar system using only web standards. It's fully animated – though Alex takes advantage of some new CSS 3 features (border ...