getHTMLElementsFromVueRef
Gets an array of HTMLElement items from a ref.
If there are none, the array returned will be empty rather than undefined.
function getHTMLElementsFromVueRef(ref: unknown): HTMLElement[];
ref- The ref to extractHTMLElementitems from.
Returns an Array of HTMLElement items.
Possibly empty.
Throws an error if an HTMLElement could not be found from a valid ref.