Function focusFirst

packages/react-aria/src/focus/FocusScope.tsx:258–269

(opts = {})

      return previousNode;
    },
    focusFirst(opts = {}) {
      let scope = scopeRef.current!;
      let {tabbable, accept} = opts;
      let scopeRoot = getScopeRoot(scope);
      let walker = getFocusableTreeWalker(scopeRoot, {tabbable, accept}, scope);
      walker.currentNode = scope[0].previousElementSibling!;
      let nextNode = walker.nextNode() as FocusableElement;
      if (nextNode) {
        focusElement(nextNode, true);
      }
      return nextNode;
    },
    focusLast(opts = {}) {
      let scope = scopeRef.current!;
      let {tabbable, accept} = opts;