vue.js confitionally import mixin

Question

i've been working on mixins but i can't have any clue with this.

what i want is conditionally import js file but NOT using component.

this is the FIRST way what i've been doing so far.

export default {
    mixins:[],
    mounted(){     
      if( condition1){
         require('../folder/file1.js');
      }else if(condition2){
         require('../folder/file2.js');
      }else if(condition3){
         require('../folder/file3.js');
      }
    }
}

but the problem is that i don't know how to make these js files as mixins ! is there any way to make this as a mixins?

---

this is the SECOND way

normally mixins are declared like this, so i imported upper than this. like below

if(condition1) {
  import file1 from '../folder/file1.js'
}else if(condition2){
  import file2 from '../folder/file2.js'
}
export default {
  mixins: [file1, file2]
}

but it keeps make error so it just keeps making blank page. (error msg is like something undefined with conditions..!) so will it be solved if i made condition right? or do i missing something?

your help will be very very appriciated :-) thanks!