box-shadow and border rendering bug

Question

Css causing the \"bug\":

div {
    width: 100px;
    height: 100px;
    background-color: transparent;
    box-shadow: 0 0 15px 20px #000 in         


        

Answer 1

Definitely looks like a bug in box-shadow (when using the spread arg). As a work-around just use an overlay div. Here's the code:

html:

<div></div>
<div class="overlay"></div>

css:

div {
    margin:10px;
    width: 100px;
    height: 100px;
    background-color: transparent;
    box-shadow: 0 0 15px 20px #000 inset;
    border: 100px solid #000 ;
    border-radius: 150px;
}
div.overlay {
    margin-top:-310px;
}

Here's the fiddle: http://jsfiddle.net/eX3cy/1/

Edit:

Here's a fiddle with the blur and spread adjusted as well (to show that identical results, minus the unwanted parts, can be achieved): http://jsfiddle.net/wgpzL/