Remaining Backward Compatible
We are constantly working to improve webOS TV, and as a result, various specifications and features have been newly added or changed to the webOS TV platform. For example, the web engine used in the webOS TV platform had been changed from WebKit to Blink at the release of webOS TV v3.0. Due to this kind of changes, your app made for previous webOS TVs might not work on the latest version of webOS TV. It is time for you to consider backward compatibility.
The following guide describes the issues arising from version difference and how to make the code work across all versions of webOS TV.