How can I add a box-shadow on one side of an element?

Question

I need to create a box-shadow on some block element, but only (for example) on its right side. The way I do it is to wrap the inner element with box-shado

Answer 1

div {
 border: 1px solid #666;
    width: 50px;
    height: 50px;
    -webkit-box-shadow: inset 10px 0px 5px -1px #888 ;
}