title: How to fix slick slider jumping image on load
body: <p>I have slick slider with adaptiveHeight attribute set to false. So, if i  have small image in slick container first slide - it will be centered vertically, and left areas will be filled with background color (like in <a href="https://i.stack.imgur.com/1g0M3.png" rel="nofollow noreferrer">this image</a>).</p>
  
  <p>How can i calculate slick slider area height before slick is loaded to prevent 'jumping' on load? Do anyone know, how slick calculates image height and width in slick container? Any ideas? </p>