Is background shorthand supported?

by David Storey

HTML

<div id="css1"></div>
<div id="with-bg-size"></div>
<div id="with-box"></div>

CSS

div {
    width: 250px;
    height: 250px;
    border: 1px solid green;
    margin: .5em;
    padding: 25px;
}
#css1 {
    background: url("https://dl.dropboxusercontent.com/u/444684/openwebref/images/placeholder.png") top right no-repeat;
}
#with-bg-size {
    background: url("https://dl.dropboxusercontent.com/u/444684/openwebref/images/placeholder.png") top right / 50% no-repeat;
}
#with-box {
    background: url("https://dl.dropboxusercontent.com/u/444684/openwebref/images/placeholder.png") top right / 50% no-repeat content-box padding-box;
}