CSS styles are not refreshing after component re-rendering in Redux for React app

Currently, I am in the process of developing a webpage using React and have implemented redux for data access.

However, I have encountered an issue where clicking on a product displays the correct page, but when navigating back and selecting a different product, the data updates correctly but the photo height in CSS remains unchanged.

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Product 1Product 2 (photo height does not update)

export const productDetailsReducer = (state = { product: {} }, action) => {

switch (action.type) {
    case PRODUCT_DETAILS_REQUEST:
        return {
            loading: true,
            ...state     <------I am sending the previous state
        }
    case PRODUCT_DETAILS_SUCCESS:
        return {
            loading: false,
            product: action.payload,
        }
    case PRODUCT_DETAILS_FAIL:
        return {
            loading: false,
            error: action.payload
        }
    case CLEAR_ERRORS:
        return {
            ...state,
            error: null
        }

    default:
        return state
}

Answer №1

Before making any changes, it is important to iterate through the process.

        return {
            ...state     <------ iterate
            loading: true, <----- set new values
        }

Furthermore, it is recommended to always iterate to avoid modifying the entire state unnecessarily.

export const productDetailsReducer = (state = { product: {} }, action) => {

switch (action.type) {
    case PRODUCT_DETAILS_REQUEST:
        return {
            ...state
            loading: true,
        }
    case PRODUCT_DETAILS_SUCCESS:
        return {
            ...state,
            loading: false,
            product: action.payload,
        }
    case PRODUCT_DETAILS_FAIL:
        return {
            ...state,
            loading: false,
            error: action.payload
        }
    case CLEAR_ERRORS:
        return {
            ...state,
            error: null
        }

    default:
        return state
}

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