making two responsive images the same height

Question

I am using image width:100% (or 50%) for img, this calculates height automatically. This is ok sometimes, but not in my case.

I need to display two images in a line with the same height, but original images has different height (so in the result two images also have different height).

<div class="col-md-7 horizontal-list-media">
    <img src="http://moneyti.co/wp-content/uploads/2016/01/16-Zingis-RUS.png" style="width: 50%" class="img-responsive">
    <img src="http://moneyti.co/wp-content/uploads/2016/01/16-kazino-RUS-360x240.png" style="width: 50%" class="img-responsive">
</div>

As both images have different height, then the resulted images also has different height. I do not wish this. How to make both images the same height? Take in mind that images should be responsive when screen size changes, thus I cannot simply add height property of both images, I guess.

I also cannot change height of original images. I need to make it with css, if not possible - then with jquery.

Answer 1

Basically, you are looking for a way to keep your images in same aspect ration (height is always the same in relation to width). For this, there is a neat little CSS hack using pseudo-element and padding-top. See DEMO for example.

markup:

<div class="col-md-7 horizontal-list-media">
    <div class="img-responsive">
        <img src="http://moneyti.co/wp-content/uploads/2016/01/16-Zingis-RUS.png">
    </div>
    <div class="img-responsive">
        <img src="http://moneyti.co/wp-content/uploads/2016/01/16-kazino-RUS-360x240.png">
    </div>
</div>

css:

.img-responsive {
  width: 100%;
  float: left;
  position: relative;
  overflow: hidden;
}
.img-responsive:before {
  display: block;
  content: "";
  width: 100%;
  padding-top: 56.25%; // this makes aspect ratio 16:9, adjust at will
}
.img-responsive img {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  min-width: 100%;
  min-height: 100%;
}
@media (min-width: 640px) {
  .img-responsive {
    width: 50%;
  }
}