<div v-scope="{ count: 0, name: 'World' }">

  Hello, {{ name }}!

  <button @click="count++">{{ count }}</button>

</div>
body {
  height: 100vh;
  margin: 0;
  display: grid;
  place-items: center;
}

External CSS

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External JavaScript

This Pen doesn't use any external JavaScript resources.