title: Focus/Trigger/Click on input
body: <p>I am implementing one algorithm, and to make it done I need a js code that I can write in browser console, and this calendar to get focus/clicked/triggered, so the calendar will open and new html elements like dates and others will appear. 
  I'm talking about : <a href="https://jqueryui.com/datepicker/#default" rel="nofollow noreferrer">https://jqueryui.com/datepicker/#default</a>
  I tried in console things like <code>$('#datepicker').focus() or trigger('click') or click()</code> but it doesn't work :(</p>