Make element same width as dynamically sized image?

Question

I have a responsive slideshow-type layout with captions below each image.

I\'m attempting to get the caption to be the same width as the image. The problem is that the i

Answer 1

Try utitlizing border property

#big_container {
  display: block;
  position: relative;
  width: 100%;
  padding-bottom: 40%;
  white-space: nowrap;
  overflow-x: scroll;
  overflow-y: hidden;
}
#big_container>div {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
}
.little_container {
  display: inline-block;
  height: 100%;
  width: 100%;
  text-align: center;
}
#big_container figure {
  display: block;
  height: 100%;
  margin: 0;
}
/* 
     set `border` to `45px` as background for `figacption`
     set `border-left`, `border-right`, `border-top` to `0px`  
*/
img {
  max-height: calc(100% - 40px);
  border: 45px solid #ffffd;
  border-left: 0px;
  border-right: 0px;
  border-top: 0px;
}
/*
     set `figcaption` elements
     set `top` to `-50px` to center `content`
     in vertical middle of `border`,
     set `width` to `calc(100% / 3)` : number of `figure` elements
     set `left` to `calc(100% / 3)` : position `content` at 
     horizontal center of `:after` , `border`
*/
figcaption {
  top: -50px;
  display: block;
  position: relative;
  background-color: transparent;
  padding: 10px;
  line-height: 20px;
  box-sizing: border-box;
  width: calc(100% / 3);
  left: calc(100% / 3);
}

  

    

      
        
        
have a kitty!!1
      
    

    

      

        
        
moar kitty!
      
    

    

      

        
        
too many kitty..
      
    

  

jsfiddle https://jsfiddle.net/601a5uqv/11/ , plnkr http://plnkr.co/edit/kHnA3GUTiGu3jm4tE8l4?p=preview