vue3 中如何实现数组响应式

type dateObj = {
  title: String;
days: Number;
date: String;
};

let dataList = ref([] as dateObj[]);
// 通过 dataList.value 来修改数组数据

let dataList = reactive({
        dataList1: [] as dateObj[],
    });
// 通过 dataList.dataList1 来修改数组

let dataList: dateObj[] = reactive([]);