vue3父组件可能传入子组件一个对象，也可能是字符串，子组件的p

<script lang="ts" setup>
import { defineComponent, PropType } from 'vue';

interface MyObject {
  key1: string;
  key2: number;
}
const props = defineProps({
    propData: {
        type: [String, Object] as PropType<string | MyObject>,
        required: true,
        default:''
      }
})
</script>