rex-tils is distributed with a few examples in its source code. Most of these examples are also on CodeSandbox.
All examples use parcel-js as this is the easiest way how to boot any demo app ;).
Run the Counter example:
git clone https://github.com/hotell/rex-tils.git
cd rex-tils/examples/counter
yarn install
yarn start
Or check out the sandbox.
This is the most basic example of using rex-tils createAction for writing type safe action creators and reducers baked by rex-tils ofType RxJS operator used for proper type narrowing within Redux-observable epics ( side effects handling ).