vue 3 组合 api 道具函数无法调用可能 'undefined' 的对象

vue 3 composition api props function Cannot invoke an object which is possibly 'undefined'

我有一个名为 sortSearch 的道具,它是来自父调用者的函数或回调。

type SortSearchInterface = (
 currentSort: string,
 currentSortDir: string
) => void;

export default defineComponent({
  props: {
    //sortSearch: {
    //type: Function as PropType<(currentSort: string, currentSortDir: string)=> void>
    // type: Function as PropType<SortSearchInterface>|undefined
    // }
    sortSearch: Function as PropType<SortSearchInterface>,
  },

attempting to call this function 我得到以下错误 Cannot invoke an object which is possibly 'undefined':

     // Cannot invoke an object which is possibly 'undefined'.Vetur(2722)
      //props.sortSearch(s, state.currentSortDir);

通过我简短的谷歌搜索,找到了非常有限的示例/文档,感谢任何帮助。

您需要根据需要标记此道具:

  props: {
    sortSearch: {
      type: Function as PropType<SortSearchInterface>,
      required: true
    },
  },