Day 17: the :picture-in-picture pseudo-class

posted on

It’s time to get me up to speed with modern CSS. There’s so much new in CSS that I know too little about. To change that I’ve started #100DaysOfMoreOrLessModernCSS. Why more or less modern CSS? Because some topics will be about cutting-edge features, while other stuff has been around for quite a while already, but I just have little to no experience with it.

You can use the :picture-in-picture pseudo-class to style an element, usually a <video>, which is currently in picture-in-picture mode (PIP).

Clicking the following button puts the video in picture-in-picture mode in supporting browsers (Chrome, Edge, Safari, Opera). Firefox doesn't support the API, but you can right-click the video and select “Watch in Picture-in-Picture“.

When the video is playing in PIP mode, the placeholder for the video switches to the :picture-in-picture state. Contrary to the information in the support table on MDN, none of the browsers, except for Safari, supports the pseudo-class. At least, according to my tests.

:picture-in-picture {
  opacity: 0.3;
  filter: blur(5px);

Here's how the video placeholder, which by default is not blurred and has a black background color, looks like in Safari.

Video playing in the bottom right corner. The placeholder for the video has 50% opacity and is a bit blurred

See on CodePen

Further reading

Do you want to learn even more awesome CSS?

I'm running a workshop with my friends at Smashing Magazine in which I introduce you to the most useful modern features in CSS and show how you can implement them today in your code base to improve scalability, maintainability, and productivity.

Learn more about the workshop!

Overview: 100 Days Of More Or Less Modern CSS