<div id="app">
  <p>{{ html }}</p>
  <p v-html="html"></p>
</div>
html, body {
  display: grid;
  justify-items: center;
  align-items: center;
  
  height: 100%;
  width: 100%;
}

#app {
  display: grid;
  grid-template-rows: 35px 35px;
  justify-items: center;
  align-items: center;
}
const app = new Vue({
  el: '#app',
  data: {
    html: '<strong style="color: #c00">Hello</strong>'
  }
})

External CSS

  1. https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.5.0/css/bootstrap.min.css

External JavaScript

  1. https://cdnjs.cloudflare.com/ajax/libs/vue/2.6.10/vue.min.js