vue-observe-visibility is a Vue plugin that detects when an element or component becomes visible or hidden in the browser viewport. It exposes the v-observe-visibility directive, which calls a user-defined function whenever visibility changes. The callback receives a Boolean visibility state and the corresponding IntersectionObserverEntry object. Developers can configure the observer root, root margin, and visibility threshold through standard Intersection Observer options. A once mode stops observation after the first visible event, making it useful for lazy loading and entrance animations. Throttling and leading-event controls reduce noisy updates during rapid scrolling. ...