Question

我正在使用React并使用上下文API，但不确定为什么我会收到此错误（可能只是某个地方出现了错字）。我在登录时正确传递了我的数据，但不确定为什么会收到此typeError

产品列表组件：

import React, { Component } from 'react'
import Product from './Product'
import Title from './Title'
import {ProductConsumer} from './Context'
import { storeProducts } from '../data'

export default class ProductList extends Component {
   state = {
       products: storeProducts
   }


    render() {

        return (
                <React.Fragment>
                <div className="py-10 mx-auto">
                    <div className="Container">
                    <Title name="our" title=" Products" />

                    <div className="row">
                    <ProductConsumer>
                        {value => {
                          return value.products.map(product => {
                            return <Product key={product.id} product={product} />
                          })                            
                        }}
                    </ProductConsumer>
                        </div>
                    </div>
                </div>
                </React.Fragment>

        )
    }
}

产品组件从“反应”导入React，{组件}

export default class Product extends Component {
    render() {
        return (
            <div>
                <h3>Hello from the Product </h3>

            </div>
        )
    }
}

上下文API组件

import React, { Component } from 'react'
import Product from './Product';
import {storeProducts, detailProduct} from '../data'

const ProductContext = React.createContext();
//provider

//consumer

class ProductProvider extends Component {
    state = {
        product: storeProducts,
        detailProduct: detailProduct
    }
    handleDetail = () => {
        console.log('Hello from detail');

    }

    addToCart = () => {
        console.log('Hello from add to cart');

    }
    render() {
        return (
            <ProductContext.Provider value={{
                ...this.state,
                handleDetail:this.handleDetail,
                addToCart:this.addToCart
            }}>


                {this.props.children}

            </ProductContext.Provider>
        )
    }
}

const ProductConsumer = ProductContext.Consumer;

export {ProductProvider, ProductConsumer}

TypeError：无法读取未定义React的属性'map'

0 个答案: