报错如下
属性或方法“范围”不是在实例上定义的，而是在呈现期间引用的。 通过初始化属性，确保此属性是反应性的，无论是在数据选项中，还是对于基于类的组件。
原因在template中未添加此行声明 slot-scope="scope"
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