ez-tip

A lightweight, zero-dependency JavaScript tooltip library that uses CSS custom properties for full styling flexibility. Tooltips can be triggered on hover or displayed permanently, with configurable delay, offset, and positioning.

@financial-times/o3-tooltip

Provides a viewport-aware tooltip for annotating or or highlighting other aspects of a product's UI

postcss-hover-media-feature

PostCSS plugin that extracts and wraps rules containing `:hover` pseudo-classes in `@media (hover: hover) {}` media queries