Backwards compatibility issues: The main goal here (other than to use camel-case notation!) is to preserve backwards compatibility. Unfortunately this isn't 100% possible:
- DataTable.defaults.columns has been renamed to be DataTable.defaults.column
- Otherwise it conflicts with aoColumns in the defaults.
Without doubt this is going to be a long process - for example the unit tests and examples need to be completely updated for this change. The JSDoc comments have been updated, so the site should take care of itself for the most part, when released.
In terms of implementation, it is important to note that I have not broken backwards compatibility here - the way it is does is that the current defaults are retained, and a camel-case to Hungarian mapping is automatically generated and then applied to the objects given by the end user. This adds around 0.5K to the size of DataTables, but writing the mapping manually would require at least 3K, and changing DataTables wholesale to camel-case would utterly break backwards compatibility. This is the least 'evil' way to accomplish this. It is important to note that this is a step along the roadmap for DataTables - come v2 Hungarian notation will likely be dropped completely.
One important note to make about this mapping is that if you use camel-case DataTables will copy the value from the camel-case properties to their Hungarian counterparts, so you will end up with additional properties on your source object. As I say, this appears to be to be the least 'evil' option, although still not perfect itself. The challenges of working with legacy software and installs...!
Removed: fnRender - fnRender was depricated in 1.9 and is now being completely removed here. Its always been a bit messy and is now superseded by mRender. The main reason for this is that DataTables use to take an independent copy of the input data source object / array. This is a performance hit and it means we can't do any binding to external objects (for example it makes Knockout integration almost impossible).
Removed: bUseRendered - with fnRender being removed, bUseRendered is irrelevent
Updated: With fnRender being removed we no longer need to take an independent copy of the data source object / array (since DataTables itself isn't ever going to write to it now - fnRender did and the copy was included so we didn't inadvertantly change a developers data source object without them knowing about it. This is no longer a problem, and in fact having it use the same data source object is extremely useful in many cases.
Fix: When using full numbers pagination in IE and clicking upon one of the numbers in the paging control, a Javascript error would occur due to trying to blur an element that was no longer in the DOM
