how to create an app with vue.js code example

Example 1: create vue project

npm install -g @vue/cli
//then
vue create hello-world

Example 2: how use vue createApp

const app = Vue.createApp({
  data() {
    return { count: 4 }
  }
})

const vm = app.mount('#app')

console.log(vm.count) // => 4