Abstract: Dependencies among components may be pre-calculated, validated and cached. The cached dependencies may then be used in an execution environment to inject dependencies into the component. In one example, components for a web application are submitted to the operator of the application. Dependencies among the components may be pre-calculated, and the pre-calculated dependencies may be stored in a catalog. When a client accesses the web application, the components may be downloaded to the client along with the catalog. The client may provide a virtual machine or other execution environment under which the components execute. The execution environment may provide a dependency injection feature that connects components together at runtime based on the pre-calculated dependencies in the catalog.