To the editor: The decrepit state of Los Angeles' sidewalks is all the fault of the city because of the trees it decided to have planted in each neighborhood.

React is not an end-to-end JavaScript application framework. It has no support for models or controllers, although there are projects related to React that cover these functions, along with routing.

Beyond the usual quick tips, let's look at both the business case and the technical side of keeping React bundles lean.