Remove 1px transparent space from CSS box-shadow in IE11?

Question

I\'m using CSS box-shadow to mimic a background that \"bleeds\" to the edges of the browser window. It works great in Chrome, Firefox, Safari, and Internet Exp

Answer 1

Now that we know it's a bug, here's one acceptable workaround:

.widget {
    width:600px;
    height:400px;
    margin:0 auto;
    text-align:center;
    background:white;
    box-shadow:20em 0 0 0 white, -20em 0 0 0 white;
    position:relative;
    z-index:2;
}
.widget:before, .widget:after {
    position:absolute;
    content: " ";
    width:1em;
    left:-1em;
    top:0;
    height:100%;
    background:white;
    z-index:1;    
}
.widget:after {
    left:auto;
    right:-1em;
}

Basically, I'm adding absolutely positioned :before & :after pseudo elements that contain nothing more than the same background color as the widget DIV and that DIV's box-shadow. These pseudo elements are offset just to the outside-left and outside-right of the widget DIV and positioned behind it so that they provide the correct color for the box-shadow bleed through.

Obviously this adds complication if one is already using the :before & :after elements, but this works for my purposes. I suppose one could also try setting negative margins on the widget DIV.

Checkout the fiddle here: http://jsfiddle.net/TVNZ2/