Object-position

For responsive

add -sm, -md, -lg or -xl to class name, for example:

<div class="opc opr-md"></div>

.opt {
    object-position: top;
}
.opb {
    object-position: bottom;
}
.opl {
    object-position: left;
}
.opr {
    object-position: right;
}
.opc {
    object-position: center;
}

.oplb {
    object-position: left bottom;
}
.oplt {
    object-position: left top;
}
.oprb {
    object-position: right bottom;
}
.oprt {
    object-position: right top;
}