title: How exporting features to shapefile in javascript in zip file format?
body: <p>I'm developing a web gis using <a href="http://openlayers.org" rel="nofollow">OpenLayer 3.18.1</a>. I have some features in <a href="http://geojson.io" rel="nofollow">geojson</a> format. 
  I want to export this features in shape file(in a single zip file) in client side using javascript. </p>
  
  <p><strong>Is it possible</strong>? if yes, <strong>How</strong>?</p>
  
  <p><strong>Update</strong>:</p>
  
  <p>I found <a href="https://github.com/borisdev/js2shapefile" rel="nofollow">js2shapefile</a> for creating shapefile. But this library has 2 difficulty:</p>
  
  <ol>
  <li>Not create .prj file,</li>
  <li>Not zip files(.shp, .shx &amp; .dbf).</li>
  </ol>
  
  <p><strong>There is no idea</strong>?</p>