maribedran/redux-learning

Redux

Implementing the https://egghead.io/courses/getting-started-with-redux course

Enviroment setup at https://github.com/reactjs/redux/tree/master/examples/counter

Concepts

1. State (Object) is read-only
   • Only actions change state
2. Actions (Object) must have a type attribute
3. Reducer functions
   • (state, action)
   • State mutations must be made by pure functions (no side-effects)
   • Previous state object must remain unchanged by action and a new one created

Store Methods

1. createStore create a store that holds the state tree of the application
2. getState returns the current state of the application
3. dispatch dispatches an action triggering a state change
4. subscribe adds a listener with a callback

Immutable objects

1. Use spread operators and Object.assign to keep objects immutable
2. Use deepFreeze to guarantee that objects don't change