use *;
/// Reactive state for an element's size.
///
/// The handle carries the element the hook watches — a [`NodeRef`] the
/// caller attaches to its own markup — and the signals that report its
/// content-box width and height.
///
/// The size is a `Signal<f64>`: a render closure that reads it
/// re-renders when the element is resized, and nothing else in the tree
/// is disturbed.