document is not defined Nuxt

upload-button.js
```

import Vue from 'vue'
import UploadButton from 'vuetify-upload-button';

Vue.use(UploadButton)
```
nuxt.config
```
plugins: [
    {src: '~/plugins/upload-button.js'},
  ],
```

I have nuxt error: document is not defined
version: 2.0.2

