Version 2.0 of the JavaScript notifier SDK introduces significant updates, including support for isomorphic applications that function on both client and server sides, and a standardized configuration and logging interface consistent with other language notifiers. This update unifies separate notifier libraries, allowing for uniform exception logging across environments and offering a single library solution. Developers can now create configuration objects for Rollbar, which can be initialized in both browser and server environments, with examples available for frameworks like Angular and Express. Rollbar is no longer a singleton but supports multiple instances, enabling different loggers with distinct configurations within applications. While upgrading from node_rollbar version 0.6.4 to 2.0.0 is not automatic, it's straightforward, with changes focusing on library initialization and usage, including the deprecation of older methods in favor of a more consistent logging approach. The library remains backward compatible, and developers are encouraged to adopt the new methods and contribute to its open-source improvement.