LoopBack 4 is the next generation of the LoopBack framework, with a completelyrewritten core foundation and significantly improved programming model. Ifyou’re an existing LoopBack user, readCrafting LoopBack 4 to understand the motivations,strategy, and innovations behind this exciting new version.

For more information on the difference between LoopBack 3 and LoopBack 4, seeUnderstanding the differences between LoopBack 3 and LoopBack 4.

To facilitate migration between LoopBack 3 and LoopBack 4, you can mount yourLoopBack 3 application on top of a LoopBack 4 project. SeeMigrating from LoopBack 3 for details.