slick slider doesn't work code example

Example 1: slick slider not work

$('.fade').slick({
  dots: true,
  infinite: true,
  speed: 500,
  fade: true,
  slide: '> div',
  cssEase: 'linear'
});

Example 2: slick onhover css doesn't work

$('.slick-slide').hover(
  function(){ $(this).addClass('hover') },
  function(){ $(this).removeClass('hover') }
)

.slick-slide.hover {
  /*something*/
}