value to test
boolean indicating whether a value is a relative URI
var bool = isRelativeURI( './beep/boop' );
// returns true
var bool = isRelativeURI( '/dashboard/admin' );
// returns true
var bool = isRelativeURI( 'http://wikipedia.org' );
// returns false
var bool = isRelativeURI( null );
// returns false
Tests whether a value is a relative URI.