title: Open popupdatefiled calendar programmatically
body: <p>Is it possible to open the date selection calendar of the <code>PopUpDateField</code> programmatically?</p>
  
  <p>I want to have something like a <code>DateRangeField</code> in Vaadin. It's made up of two <code>PopUpDateField</code>'s one for the first value ("from") and the other one for the "to" value. When the "from" value is changed I want that the calendar selection opens automatically for the "to" value, <em>without</em> the user needing to press the calendar icon of the "to" field.
  <a href="https://i.stack.imgur.com/EwiPb.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/EwiPb.png" alt="enter image description here"></a></p>
  
  <p>I can't find this functionality anywhere in the <a href="https://vaadin.com/docs/-/part/framework/components/components-datefield.html" rel="nofollow noreferrer">Vaadin DateField components</a></p>