Sticky positioning is one of those CSS features that’s pretty delicate and can be negated by a lot of things, so here’s another one to add to your mental catalog: Sticky elements don’t play nicely if they have to coordinate with other elements to make up a combined height, like `100vh`. Philip Braunen explores why this happens and presents a solution to fix it.

The position CSS property sets how an element is positioned in a document. The top, right, bottom, and left physical properties and the inset-block-start, inset-block-end, inset-inline-start, and inset-inline-end flow-relative logical properties can be used to determine the final location of positioned elements.