How do I remove the gray border that surrounds background images?

Question

I\'ve come across an interesting problem in the following line of code:

Answer 1

The following will use css to set the src to a tiny transparent image which solves the src attribute issue while maintaining control from image:

content:url('data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7')

My overall approach is to define the following in my reset.css, then use a class to provide the actual image and control it. This behaves just like an img, but is entirely css controlled.

img {
  display: -moz-inline-box;
  -moz-box-orient: vertical;
  display: inline-block;
  *display: inline;
  vertical-align: middle;
  *
  vertical-align: auto;
  font: 0/0 serif;
  text-shadow: none;
  color: transparent;
  background-size: contain;
  background-position: 50% 50%;
  background-repeat: no-repeat;
  box-sizing: border-box;
}

img:not([src]) {
    content:             url('data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7');
}

.myuniqueimage {
    background-image: url('../images/foobar.png');
    height: 240px;
}

Thanks to +programming_historian and +binnyb for the data:image tip