Nuxt.js

Create plugin file plugins/disqus.js

import Vue from 'vue'
import VueDisqus from 'vue-disqus'

Vue.use(VueDisqus, {
  shortname: 'your_shortname_disqus'
})

In config file nuxt.config.js

// ...
plugins: [
  '~/plugins/disqus'
]

Using in Vue file components

<template>
  <div class="comments">
    <Disqus />
  </div>
</template>