A 'damaged' resource is a resource (either css or js) which is not valid (corrupted). Merging damaged resource with a valid resource could result in a damaged bundle. That is why, removing it from the model could be useful feature. Nevertheless, it is the responsibility of the client to keep the model sane and not add damaged resources to the model.

A resource should be identified as damaged using a custom processor implementation which is capable identifying the type of resource and if it is valid one.

The damaged resources will be removed from the model using a custom ModelTransformer. This model should either not be used by default, or should use a NoOp processor (assume all resources are not damaged).

In order to fully enable this feature (actually apply the processor responsible to detect damaged resources), a custom configuration should be required.

Discussion about this topic on the forum: https://groups.google.com/forum/#!topic/wro4j/cp3CPZKchCY