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February 12, 2021 01:35
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useReducer
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| // This is gross and hard to read | |
| const BasicComponent = () => { | |
| const [isOpen, setIsOpen] = useState(false); | |
| const [name, setName] = useState(''); | |
| const [isLoading, setIsLoading] = useState(false); | |
| const [error, setError] = useState(null); | |
| const [id, setid] = useState(''); | |
| return ( | |
| // ... | |
| ) | |
| } | |
| // Refactored this is a lot easier to read, more modular, and faster! | |
| const initialState = { | |
| isOpen: false, | |
| name: '', | |
| isLoading: false, | |
| error: null, | |
| id: '' | |
| } | |
| const reducer = (state, action) => { | |
| switch (action.type) { | |
| case 'setIsOpen': | |
| return { ...state, isOpen: action.payload } | |
| break; | |
| // ... | |
| default: | |
| return state; | |
| } | |
| } | |
| const BetterComponent = () => { | |
| const [state, dispatch] = useReducer(reducer, initialState); | |
| return ( | |
| // ... | |
| ) | |
| } |
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