<div id="app">
<div id="box1"></div>
<div class="box2"></div>
</div>const { createApp, onMounted, ref } = Vue;
const app = createApp({
setup() {
onMounted(() => {
const box1 = document.getElementById("box1");
const box2 = document.querySelector(".box2");
console.log('DOM Box1：', box1);
console.log('DOM Box2：', box2);
})
}
});
app.mount('#app');
External CSS
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