Creating and serving image blur placeholders
Particularly when images make up a significant portion of the page experience, a perceived performance trick to keep up your sleeve is making use of blur placeholders..
Stuff to read
Detecting when an element becomes sticky
Want to style a sticky element differently when it becomes sticky, or simply run some code when it becomes sticky? You can't do it with CSS alone, but there is a way...
You should overcommunicate pending state
As a sufferer of "having slow internet", I'm appreciating the feedback of when something is happening in interfaces now more than ever.