const { createApp, onMounted, onBeforeMount } = Vue;
const app = createApp({
data(){
return {
aa: 1
}
},
setup() {
console.log(11111);
onBeforeMount(() => {
console.log('onBeforeMount')
});
onMounted(() => {
console.log('onMounted')
});
}
}).mount("#app")
<div id="app">{{aa}}</div>