Reference another property value from the same containing block.
Restricted to referencing properties that don't already reference other properties.
this( property-name, fallback )
Parameters
property-name
Property namefallback
A CSS value
Returns
The referenced property value, or the fallback if it has not been set.
Examples
.foo {
width: this( height );
height: 100em;
}
/* The following both fail because they create circular references. */
.bar {
height: this( width );
width: this( height );
}