frontend-bootcamp/step2-05/exercise/README.md

Step 2.5: Redux: Reducers (Exercise)

Lessons | Exercise | Demo

Exercise

If you still have the app running from a previous step, stop it with ctrl+c. Start the tests instead by running npm test from the root of the frontend-bootcamp folder.

1. First, take a look at the store interface in exercise/src/store/index.ts. Note that the Store interface has two keys: todos and filter. We'll concentrate on todos, which is an object where the keys are string IDs and the values are of a TodoItem type.

2. Open exercise/src/reducers/pureFunctions.ts and fill in the missing function bodies.

3. Open exercise/src/reducers/index.ts and fill in the missing case statements for the switch on action.type.

4. Open exercise/src/reducers/pureFunctions.spec.ts and implement tests for the functions you wrote for remove, complete, and clear.