Slick carousel - force slides to have the same height

I'm having trouble with the Slick carousel JS plugin with multiple slidesToShow which have different heights.

I need the Slides to have the same height, but with CSS flex-box it doesn't work as the slides have conflicting CSS definitions.

Also, I didn't find anything useful in the forums and on the web.

HTML

<div class="slider">
  <div class="slide">
    <p>Lorem ipsum.</p>
  </div>
  <div class="slide">
    <p>Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua</p>
  </div>
  <div class="slide">
    <p>At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet.</p>
  </div>
  <div class="slide">
    <p>Lorem ipsum dolor sit amet, consetetur sadipscing elitr.</p>
  </div>
</div>

JS

$('.slider')
.slick({
    autoplay: false,
    dots: false,
    infinite: false,
    arrows: false,
    slidesToShow: 2,
    slidesToScroll: 2,
    rows: 0
});

CSS

.slide {
  height: 100%;
  background-color: #ccc;
  padding: 10px;
}

Solution 1:

Add a couple of CSS styles and it will be ready:

.slick-track
{
    display: flex !important;
}

.slick-slide
{
    height: inherit !important;
}

Enjoy! :-)

Solution 2:

Ok guys i found an easy solution. Just add a setPosition callback function (fires after position/size changes) which sets the height of the slides to the height of the slider (slideTrack):

JS

$('.slider').slick({
    autoplay: false,
    dots: false,
    infinite: false,
    arrows: false,
    slidesToShow: 2,
    slidesToScroll: 2,
  rows: 0
})
.on('setPosition', function (event, slick) {
    slick.$slides.css('height', slick.$slideTrack.height() + 'px');
});

Dont forget that your slides need to have full height:

CSS

.slide {
  height: 100%;
}

Here is a little jsFiddle to demonstrate: https://jsfiddle.net/JJaun/o29a4q45/

Solution 3:

The js solution from @JJaun is not perfect, because you see the height jumping if you use an background image for the slides. This worked for me:

.slick-track {
  display: flex !important;
}

.slick-slide {
  height: auto;
}