A designer I work with was presenting comps at a recent team meeting. She had done a wonderful job piecing together the concept for a design system, from components to patterns and everything in between that would make any front-end developer happy.
But there was a teeny tiny detail in her work that caught my eye: the hover state for links was a squiggle.
Default link (top) and hover effect (bottom)
Huh! Not only had I not seen that before, the idea had never even crossed my mind. Turns out there are plenty of instances of it on live sites, one being The Outline. That was the one that was implementation that inspired the design.
... read the whole story at css-tricks.com.