.red {
  padding: 1rem;
  border: 3px solid red
}

const { createApp, ref, computed } = Vue;

const app = createApp({
  setup() {
    const num1 = ref(2);
    const total = computed(() => {
      console.log('computed');
      return num1.value * 2
    })
    
    const add = () => {
      console.log('methods');
      return num1.value * 2
    }
    
    return {
      total,
      add
    }
  }
});

app.mount('#app');