import { onMounted , getCurrentInstance} from 'vue'
const instanceContext = getCurrentInstance()
onMounted(() => {
uni.createIntersectionObserver().relativeTo('.app', {}).observe(".target", (res) => {
console.log('call')
});
})
<template>
<page-meta></page-meta>
<view class="app">
<view class="target"></view>
</view>
</template>