vue UnwrapRefSimple<T> 泛型类型无法在反应时分配给 T

Question

我创建了一个钩子函数并想在其他地方重用它：

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import { ref, Ref, reactive } from 'vue'\n\nconst useSelectAarray = <T>(items: T[]) => {\n  const selectItem: Ref<T|null> = ref(null)\n  const options = reactive([...items])\n  const select = (key: string, value: any) => {\n    const trigger = options.find((item: { [index: string]: any }) => item[key] === value)\n\n    if (typeof trigger !== 'undefined') {\n      selectItem.value = trigger\n    }\n  }\n\n  return {  \n    selectItem,\n    select,\n    items: options\n  }\n}\n

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但是在selectItem.value = trigger，我收到类型错误Type 'UnwrapRefSimple<T>' is not assignable to type 'T'\xe3\x80\x82

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我怎么解决这个问题？

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Answer 1

const selectItem = ref<T>(null) as Ref<T?>

请参阅： https: //github.com/vuejs/vue-next/issues/2136