Building a HUD interface with plain CSS
No framework, no build step. Just clip-path, custom properties and a few lines of JavaScript.
You do not need a component library to build a sci-fi interface.
Chamfered corners
clip-path with a polygon cuts the corners. Four points give you a diagonal on the top-right and bottom-left.
Corner brackets
Two pseudo-elements with borders on two sides each. Position them in opposite corners and you have a targeting frame.
Live readouts
A setInterval that rewrites a time element every second is enough to make a panel feel alive.
Respect reduced motion
Wrap animations in a prefers-reduced-motion query. A HUD that makes people ill is a failed HUD.