vue3 reactive创建带类型的空数组

在Vue3中，可以使用reactive函数创建一个响应式的空数组。具体的代码如下所示：

import { reactive } from 'vue';

const arr = reactive<Array<number>>(\[\]);

在上述代码中，我们使用了泛型来指定数组的类型为`Array<number>`，这样就创建了一个带类型的空数组。你可以根据需要修改泛型的类型来创建不同类型的空数组。
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