Supported by Safari.
Allows the user to resize an element.
See also the specification.
Currently Safari requires the element to have an overflow other than visible
in order to be resizable. This is not according to the spec, which doesn't say a word about required values
of overflow.
This is the test <p>. Try to resize it.
p#test {
border: 1px solid #000000;
overflow: auto;
resize: both;
}