Overview of built-in combined functions

The built-in combined function is the official useXxx() capability provided by ElfUI. They are not reactive primitives, but DOM, Host, event, observer, and form wrappers for service component authors.

Classification	API
Host	useHost、useRenderRoot、useShadowRoot、useAttrs
Template reference	useTemplateRef
DOM events	useEventListener, useClickOutside
Observer	useResizeObserver, useIntersectionObserver
Interactive control	useEscapeKey, useScrollLock, useFocusTrap
Form controls	useFormControlContext, createFormControlContext

These functions must be called during the component setup synchronization phase, which is the top level of the macro component.