'How to make reusable pagination with react and redux?
On my application i'm using Reduxjs/toolkit for state management and TypeScript for type safety. My backend were wrote in Node.js with MongoDB.
I have implemented pagination for one slice/component, and i know that is not the best solution and i want to improve it and make reusable for other slices.
Could you help me with that? Give me some hints?
Below is my current pagination implementation:
// CategorySlice
interface InitialState {
categories: ICategory[];
isFetching: boolean;
errorMessage: string | null;
// to refactor
currentPage: number;
itemsPerPage: number;
totalResults: number;
}
const initialState: InitialState = {
categories: [],
isFetching: false,
errorMessage: '',
// to refactor
currentPage: 1,
itemsPerPage: 9,
totalResults: 0,
};
export const fetchCategories = createAsyncThunk<
{ data: ICategory[]; totalResults: number },
number
>('category/fetchCategories', async (currentPage, { rejectWithValue }) => {
try {
const accessToken = getToken();
if (!accessToken) rejectWithValue('Invalid token');
const config = {
headers: { Authorization: `Bearer ${accessToken}` },
};
const response: IApiResponse<ICategoryToConvert[]> = await api.get(
`/categories?page=${currentPage}&limit=9&isPrivate[ne]=true`,
config
);
const data = response.data.data;
const convertedData = data.map(e => {
return {
id: e._id,
name: e.name,
image: e.image,
};
});
return {
totalResults: response.data.totalResults,
data: convertedData,
};
} catch (error) {
removeToken();
return rejectWithValue(error);
}
});
export const categorySlice = createSlice({
name: 'category',
initialState,
reducers: {
setNextPage(state, { payload }) {
state.currentPage = payload;
},
},
extraReducers: builder => {
builder.addCase(fetchCategories.pending, state => {
state.isFetching = true;
state.errorMessage = null;
});
builder.addCase(fetchCategories.fulfilled, (state, action) => {
state.categories = action.payload.data;
state.isFetching = false;
state.totalResults = action.payload.totalResults;
});
builder.addCase(fetchCategories.rejected, state => {
state.isFetching = false;
state.errorMessage = 'Problem with fetching categories 🐱👤';
});
},
});
// Category Page
const CategoryPage = () => {
const dispatch = useAppDispatch();
const { currentPage } = useAppSelector(state => state.category);
useEffect(() => {
dispatch(fetchCategories(currentPage));
}, [dispatch, currentPage]);
return (
<ContainerWrapper>
<CategoryList />
</ContainerWrapper>
);
};
export default CategoryPage;
Inside CategoryPage I'm passing those properties from state selector.
<Pagination
currentPage={currentPage}
itemsPerPage={itemsPerPage}
paginate={(n: number) => dispatch(categoryActions.setNextPage(n))}
totalItems={totalResults}
/>
And finally PaginationComponent
interface IProps {
itemsPerPage: number;
totalItems: number;
paginate: (numb: number) => void;
currentPage: number;
}
const Pagination = ({ itemsPerPage, totalItems, paginate, currentPage }: IProps) => {
const numberOfPages = [];
for (let i = 1; i <= Math.ceil(totalItems / itemsPerPage); i++) {
numberOfPages.push(i);
}
return (
<nav className={styles['pagination']}>
<ul className={styles['pagination__list']}>
{numberOfPages.map(number => {
return (
<li
key={number}
className={`${styles['pagination__item']} ${
currentPage === number && styles['pagination__item--active']
}`}
onClick={() => paginate(number)}
>
<div className={styles['pagination__link']}>{number}</div>
</li>
);
})}
</ul>
</nav>
);
};
export default Pagination;
Sources
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Source: Stack Overflow
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