PUBLIC MARKS from decembre with tags demo & browser

If you were attentive you should see that the line width: calc( 12.5em ) is the trick here. Why? Let’s see all these widths like in pairs – exactly what we need browsers to do. The first pair is width: 80% (content) and width: 16.666% (sidebar) that does the job in calc() incompatible browsers, which will just ignore calc(). It is the callback (backup). It means that the minority of website visitors will see narrower sidebar on narrower viewports. And that should be perfectly fine for people using older browser versions. The second: width: calc( 100% - 15em ) and width: calc( 12.5em ). This is for newer browser versions which will override the previous width definitions

the browser only knows the size of the viewport when it begins downloading images.

nous allons vous montrer comment créer les légendes des images avec diverses transitions simplement en utilisant CSS3. Simple transition effect with only CSS3.How to create image captions with various transitions simply using CSS3, dependent on transform and transition properties.