modular-app.vue

<template>
  <!-- template code -->
</template>
<script>
import download from "@/use/download";
import upload from "@/use/upload";
export default {
  setup(){
    return { ...download(), ...upload() }
  }
}
</script>

It is recommended to explicitly put the options in the component, so we don't have the same issue as with mixings: not knowing where the methods came from.

   return { filePath, downloadBlob, downloadJSON, /*...*/}