Pseudo-elements on images

[KittyGiraudel]

As far as I know, pseudo-elements do not work on replaced content. img is a replaced element, thus the ::after pseudo-element won't display anything.

More informations: http://red-team-design.com/css-generated-content-replaced-elements/.

[jensgro]

You are mostly right. But when images cannot be displayed, the pseudo-elements are present. So you can display a failure notice which will vanish when the image is loaded.