A janky example of pairing an API fake with UI development, verified using consumer contract testing.
See my blog post, "A Strategy for Parallel Vertical Development: API Fakes and Contract Testing"
There are 2 projects in this workspace to run simultaneously. With two terminals, and your working directory in each package, run yarn start.
First start the fake API (packages/todos-fake). Then, starting the UI app (packages/my-app), built with create-react-app will launch your web browser to http://localhost:3000/.