Tracks device battery state. Plays audio and exposes its controls. Tracks geo location state of user's device. Triggers callback when user clicks outside target area. Tracks mouse hover state of some element. Display an element or video full-screen. Tracks location hash value. Tracks whether user is being inactive. Tracks an HTML element's intersection. Synthesizes speech from a text string. Tracks page navigation bar location state. Re-renders component, while tweening a number from 0 to 1...