NORMAL :

<div id="app">
  {{ message }}
</div>
var app = new Vue({
  el: '#app',
  data: {
    message: 'Hello Vue!'
  }
})

BINDING :

<div id="app-2">
  <span v-bind:title="message">
    Hover your mouse over me for a few seconds
    to see my dynamically bound title!
  </span>
</div>
var app2 = new Vue({
  el: '#app-2',
  data: {
    message: 'You loaded this page on ' + new Date().toLocaleString()
  }
})

V- = DIRECTIVES

V-IF

<div id="app-3">
  <span v-if="seen">Now you see me</span>
</div>
var app3 = new Vue({
  el: '#app-3',
  data: {
    seen: true
  }
})

V-FOR

<div id="app-4">
  <ol>
    <li v-for="todo in todos">
      {{ todo.text }}
    </li>
  </ol>
</div>
var app4 = new Vue({
  el: '#app-4',
  data: {
    todos: [
      { text: 'Learn JavaScript' },
      { text: 'Learn Vue' },
      { text: 'Build something awesome' }
    ]
  }
})