title: MultiSelect date picker using typescript
body: <p>I want to implement multiselect date picker using ngb and tyepscript. Can someone plz help me with coding using Angular 4? 
  I want to convert this jquery to typescript.</p>
  
  <pre><code>$('.date').datepicker({
      multidate: true,
      format: 'dd'
  });   
  </code></pre>