how to define the return value type of app.mount()

[Mr-Nobody-li]

how to define the return value type of app.mount() ？
I have a component and want to create Multiple application instances, but when I use the return value of the mount() to modify the variables associated with the component, ts prompts me that

Property 'content' does not exist on type 'ComponentPublicInstance<{}, {}, {}, {}, {}, {}, {}, {}, false, ComponentOptionsBase<any, any, any, any, any, any, any, {}>'

here is my component, and expose content

// myComponent
<template>
hello
</template>

<script lang="ts" setup>
import { ref } from 'vue'
const content = ref('')
defineExpose({ content })
</script>

mount component to dom in main.ts

// main.ts
import myComponent from './myComponent.vue'
const tooltipInstance = createApp(myComponent).mount('#v-tooltip')
tooltipInstance.content = 'xxx'

At this time, ts reports an error for tooltipInstance.conent

Property 'content' does not exist on type 'ComponentPublicInstance<{}, {}, {}, {}, {}, {}, {}, {}, false, ComponentOptionsBase<any, any, any, any, any, any, any, any, any, {}>>'.ts(2339)

Is there any way to get the type of component and apply it to the return value of app.mount()

[chenxch]

This solution should solve your problem.

import myComponent from './myComponent.vue'
import type { ComponentPublicInstance } from 'vue'
import type MyComponent from './myComponent.vue'

type MyComponentInstance = InstanceType<typeof MyComponent>

const tooltipInstance = createApp(myComponent).mount('#v-tooltip')  as ComponentPublicInstance<MyComponentInstance>
tooltipInstance.content = 'xxx'

[Mr-Nobody-li]

import tooltipComponent from './tooltip-component.vue'
import { createApp, Directive, DirectiveBinding } from 'vue'
import type { ComponentPublicInstance } from 'vue'
import type MyComponent from './tooltip-component.vue'

//  type MyComponentInstance = any
type MyComponentInstance = InstanceType<typeof MyComponent>

Why do I got any here? QAQ

[chenxch]

In the development mode, it is any state. If the component is compiled, it will be a correct component type.