Vue

HTML

<div id="app">
    <h2>What's your name:</h2>
    <input v-model="name" />
    <div>Hello {{ name }}</div>
</div>

CSS

body {
  background: #20262E;
  padding: 20px;
  font-family: Helvetica;
}

#app {
  background: #fff;
  border-radius: 4px;
  padding: 20px;
  transition: all 0.2s;
}

li {
  margin: 8px 0;
}

h2 {
  font-weight: bold;
  margin-bottom: 15px;
}

del {
  color: rgba(0, 0, 0, 0.3);
}

Vue

new Vue({
    el: "#app",
    data: {
       	name: ""
    }
})