7^th Practical Class:
useReducer

Problem: Too Many useStates

useReducer:
"Advanced useState"

Building Blocks:

• initial state: how state looks
• actions: "interactions"
• reducer: how to update state

Counter

Initial State

Actions

Reducer

useReducer

• Reac documentation for useReducer

initialState

Actions

• simple object with all necesary data (like id, new title, ...)

Action Creators

• "function that returns action object"

• action objects:

• action creators: