title: how to change a height layout as animation (programmatically)
body: <p>how to change a height layout programatically as animation?</p>
  
  <p>first :</p>
  
  <p><img src="https://i.stack.imgur.com/8aPF6.jpg" alt="enter image description here"></p>
  
  <p>after :</p>
  
  <p><img src="https://i.stack.imgur.com/SKGhq.jpg" alt="enter image description here"></p>