vue3获取ref实例结合ts的InstanceType问题怎么解决

<!-- MyModal.Vue -->
<script setup lang="ts">
import { ref } from 'vue'

const sayHello = () => (console.log('我会说hello'))

defineExpose({
  sayHello
})
</script>

<!-- App.vue -->
<script setup lang="ts">
import MyModal from './MyModal.vue'
const MyModalRef = ref()

const handleOperation = () => {
  MyModalRef.value.sayHello
}
</script>

<!-- MyModal.vue -->
<script setup lang="ts">
import { ref } from 'vue'

const sayHello = () => (console.log('我会说hello'))

defineExpose({
  open
})
</script>

<!-- App.vue -->
<script setup lang="ts">
import MyModal from './MyModal.vue'

const MyModalRef = ref<InstanceType<typeof MyModal> | null>(null)

const handleOperation = () => {
  MyModalRef.value?.sayHello()
}
</script>

<script setup lang="ts">
const props = defineProps({
  foo: { type: String, required: true },
  bar: Number
})
 
props.foo // string
props.bar // number / undefined
</script>

<script setup lang="ts">
const props = defineProps<{
  foo: string
  bar?: number
}>()
</script>
 

interface Props {
  msg?: string
  labels?: string[]
}
 
const props = withDefaults(defineProps<Props>(), {
  msg: 'hello',
  label: () => ['one', 'two']
})

import { defineComponent } from 'vue'
 
export default defineComponent({
  props: {
    message: String
  },
  setup(props){
    props.message // 类型：string
  }
})

<script setup lang="ts">
// 运行时
const emit = defineEmits(['change', 'update'])
 
//基于类型
const emit = defineEmits<{
  (e: 'change', id: number): void
  (e: 'update', value: string): void
}>()
</script>

import { defineComponent } from 'vue'
 
export default definComponent({
  emits: ['change'],
  setup(props, { emit }) {
    emit('change') //类型检查 / 自动补全
  }
})

import { ref } from 'vue'
 
// 推导出的类型：Ref<number>
 
const year = ref(2022)
 
// TS Error: Type 'string' is not assignable to type 'number'.
year.value = '2022'

import { ref } from 'vue'
import type { Ref } from 'vue'
 
const year: Ref<string | number> = ref(2022)
year.value = 2022 //成功

// 得到的类型：Ref<string | number>
const year = ref<string | number>('2022')
year.value = 2022 //成功

// 推导得到的类型：Ref<number | undefined>
const n = ref<number>()

import { reactive } from 'vue'
 
//推导得到的类型：{ title: string }
const book = reactive({ title: 'Vue 3 指引'})

import { reactive } from 'vue'
 
interface Book {
  title: string
  year?: number
}
 
const book: Book = reactive({ title: 'Vue 3 指引' })

import { ref, computed } from 'vue'
const count = ref(0)
 
// 推导得到的类型：ComputedRef<number>
const double = computed(() => count.value * 2)
 
// TS Error: Property 'split' does not exist on type 'number'
const result = double.value.split('')

const double = component<number>(() => {
  // 若返回值不是 number 类型则会报错
})

<script srtup lang="ts">
function handleChange(event) {
  // `event` 隐式地标注为 `any`类型
  console.log(event.target.value)
}
</script>
 
<template>
  <input type="text" @change="handleChange" />
</template>

function handleChange(event: Event) {
  console.log((event.target as htmlInputElement).value)
}

import { provide, inject } from 'vue'
import type { Injectiokey } from 'vue'
 
const key = Symbol() as Injectionkey<string>
provide(key,'foo') // 若提供的是非字符串值会导致错误
 
const foo = inject(key) // foo 的类型： string | undefined

const foo = inject<string>('key') // 类型：string | undefined

const foo = inject<string>('foo', 'bar') // 类型：string

const foo = inject('foo') as string

<script setup lang="ts">
import { ref, onMounted } from 'vue'
const el = ref<HTMLInputElement | null>(null)
 
onMounted(() => {
  el.value?.focus()
})
</script>
 
<template>
  <input ref="el" />
</template>

<script setup lang="ts">
import { ref } from 'vue'
 
const isContentShown = ref(false)
const open = () => (isContentShow.value = true)
 
defineExpose({
  open
})
</script>

<script>
import MyModal from './MyModal.vue'
 
const modal = ref<InstanceType<typeof MyModal > | null>(null)
const openModal = () => {
  modal.value?.open()
}
</script>