Function focusFirstDescendant

core/src/utils/focus-trap.ts:28–32

(ref: R, fallbackElement?: T)

 * If no fallback is specified then we focus the container itself.
 */
export const focusFirstDescendant = <R extends HTMLElement, T extends HTMLElement>(ref: R, fallbackElement?: T) => {
  const firstInput = ref.querySelector<HTMLElement>(focusableQueryString);

  focusElementInContext(firstInput, fallbackElement ?? ref);
};

/**
 * Focuses the last descendant in a context