Forked from fredbegin11/mapStateToProps-vs-Selector.js
Created
February 11, 2020 23:25
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React selector use case
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| // Store Redux | |
| state = { | |
| cars: { | |
| carsById: { | |
| 1: { id: 1, name "Toyota" }, | |
| 2: { id: 2, name "Lexus" }, | |
| 3: { id: 3, name "Honda" } | |
| } | |
| } | |
| }; | |
| // selectors.js | |
| const carsSelector = state => state.cars.carsById; | |
| export const getCarsSelector = createSelector(carsSelector, carsById => Object.values(carsById)); | |
| // CarListPage.js | |
| class CarListPage extends PureComponent { | |
| ... | |
| render() { | |
| return ( | |
| <div className="myClass"> | |
| {this.props.cars.map(car => <CarComponent car={car} />)} | |
| </div> | |
| ); | |
| }; | |
| ... | |
| } | |
| const mapStateToProps = state => { | |
| return { | |
| cars: getCarsSelector(state) | |
| }; | |
| }; |
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