Function setup

packages/runtime-core/__tests__/rendererOptimizedMode.spec.ts:354–369

()

    const count = ref(0)
    const Comp = {
      setup() {
        return () => {
          count.value
          return (
            openBlock(),
            (block = createBlock('div', null, [
              createVNode(
                'p',
                { onVnodeMounted: spyMounted, onVnodeBeforeUpdate: spyUpdated },
                '',
                PatchFlags.NEED_PATCH,
              ),
            ]))
          )
        }
      },
    }

    render(h(Comp), root)