Javascript library to help creating high quality justified galleries of images. Used by thousands of websites as well as the photography community 500px.
These are no longer needed in the current versions of Chrome, Edge, Firefox, Opera, and Safari, and these are self-updating browsers, so it's unlikely that any user is still using the older versions. And you'd have to be using browser versions from at least 7 years ago to run into a problem.
There are a few values in the CSS that fail validation, and can now be safely removed.
The first is (multiple occurrences, with various values):
filter: "alpha(opacity=0)";
This is for IE8 and below. Time to let that one go!
The others are:
These are no longer needed in the current versions of Chrome, Edge, Firefox, Opera, and Safari, and these are self-updating browsers, so it's unlikely that any user is still using the older versions. And you'd have to be using browser versions from at least 7 years ago to run into a problem.