Prevent invoking the softkeyboard after tapping a VuetifyJS combobox

I need to use a VuetifyJS combobox on mobile. As soon as the combobox field gets a tap it invokes the softkeyboard. How to prevent the triggering of the softkeyboard? CodePen example: https://codepen.io/anon/pen/KxVEea

HTML:

  <v-combobox
  v-model="select
  :items="items"
  label="Select an item"
  ></v-combobox>

JS:

new Vue({
  el: '#app',
  data () {
    return {
      select: 'Programming',
      items: [
        'Programming',
        'Design',
        'Vue',
        'Vuetify'
      ]
    }
  }
})

from Prevent invoking the softkeyboard after tapping a VuetifyJS combobox