How to multi download on one button

[thearabbit]

I would like to Multi download on one button

<template name="fileList">
  <div class="fileList">
    {{#each files}}
      <div class="file">
        <strong>{{this.name}}</strong> <a href="{{this.url download=true}}" class="btn btn-primary" target="_parent">Download</a>
      </div>
    {{/each}}

    <button class="downloadAll">Download All</button
  </div>
</template>
---------
// js

Please help me