Vendor-specific extensions allow you to experiment with properties that have not
been fully implemented as standard CSS properties, and also allow you to apply
proprietary properties specific to that vendor??™s implementation. They should be
avoided in everyday applications, as there is no guarantee of consistency and they
are not subject to the same rigor that applies to standard CSS properties.
In some cases, if there is no other solution, these extensions can be employed to
good effect but there is always a risk involved in doing this. If you cater for the risks
and craft your code carefully, there are occasions when these extensions can be
used without too much danger. The onus as usual lies upon the author to make sure
that the code used is as stable as possible by testing thoroughly before use.
Internet Explorer implements a wide variety of extensions that don??™t follow the CSS
specifications and in most cases are unique to IE (as in the case of expressions,
behaviors and filters).
Pages:
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564