Some people depend on undefined behavior, but there's generally not much sympathy for it, because it is in the name. On the other hand, many people have depend

Some people depend on undefined behavior, but there's generally not much sympathy for it, because it is in the name. On the other hand, many people have depended on interpretations of intent. Changing the behavior of one is much easier for the community to swallow than the other. An easy example is how early versions of IE failed to correctly implement the box model for sizing elements. For backwards compatibility reasons, IE6 and on would revert to the old, incorrect behavior if parsing the html document put it into 'quirks mode', and later on this behavior was added as an optional CSS box-sizing property. https://wiki.edunitas.com/IT/en/114-10/Internet-Explorer-box-model-bug_19539_eduNitas.html https://wiki.edunitas.com/IT/en/114-10/Internet-Explorer-box...