An original UI configuration is formed by a combination of a first user interface structural component portion, a first user interface style code portion, and a first behavioral code portion. When a variation of the first UI feature or a new feature is to be implemented, a second UI configuration is deployed, where the second UI configuration is formed by a second user interface structural component portion, a second user interface style code portion, and a second behavioral code portion. The second UI configuration implements a variation of the first UI feature. Embodiments deploy a third UI configuration formed by the second user interface structural component portion, a third user interface style code portion, and the second behavioral code portion. The third UI configuration emulates the original UI configuration using the second behavioral code portion. The third configuration or the second configuration can be enabled based on a software switch.