how to use javascript in vue js code example

Example 1: vue js tutorial

//Best project Tutorial i have seen
https://www.youtube.com/playlist?list=PL55RiY5tL51qxUbODJG9cgrsVd7ZHbPrt

Example 2: vue js implementation

var app = new Vue({
  el: '#app',
  data: {
    message: 'Hello Vue!'
  }
})

Example 3: vue js documentation

new Vue({
  el: '#app',
  data: {
    message: 'Hello Vue.js!'
  }
})