title: Save files into selected directory (javascript)
body: <p><br/>
  Hello! My question is about javascript. <br/>
  I want to <br/>
  1. ask a user to select a directory <br/>
  2. then write my bunch of files to it (probably with creating sub-directories) without interaction with user</p>
  
  <p>How can I do this? And can I? <br/>
  I am new in javascript and I hope for your help.</p>
  
  <p>PS. <br/>
  I've heard about ability to ask a user to select a path by <em>save file dialog</em> and then save data to selected file, but i want to ask a user <strong>once</strong> for selecting a <strong>directory</strong> and then create <strong>a bunch</strong> of files in it <strong>without</strong> bothering a user for each one. <br/></p>