import React, {useEffect, useState} from 'react'
import api from '../../services/api'
import './styles.css'
export default function Main(){
const [products, setProducts] = useState([])
const [page, setPage] = useState(1)
const [productsInfo, setProductsInfo] = useState({})
useEffect(() => {
async function fetchData() {
const response = await api.get(`/?page=${page}`)
const {docs, ...info} = response.data
setProductsInfo(info)
setProducts(docs)
}
fetchData()
}, [page])
function prevPage() {
if(page > 1) setPage(page - 1)
}
function nextPage() {
if(page < productsInfo.pages) setPage(page + 1)
}
return(
<div className='products-list'>
{console.log(products)}
{products.map(product => (
<article key={product._id}>
<strong>{product.title}</strong>
<p>{product.description}</p>
<a href="#">Access</a>
</article>
))}
<div className="actions">
<button onClick={prevPage()}>Previous</button>
<button onClick={nextPage()}>Next</button>
</div>
</div>
)
}
这是我的应用程序页面,用于获取产品API的数据(使用axios)。响应是具有以下结构的JSON:
{
"docs": [
{
####Product 1 info here###
},
{
###Product 2 info here###
}
],
"total": 19,
"limit": 5,
"page": "1",
"pages": 4
}
我只想在页面更改时重新获取并重新呈现产品,因此我将[page]作为useEffect()的参数传递。函数prevPage()和nextPage()处理页面更改。
由于某种原因,它返回错误:重新渲染过多。 React限制了渲染次数以防止无限循环。
答案 0 :(得分:2)
作为箭头函数调用
<button onClick={() => prevPage()}>Previous</button>
<button onClick={() => nextPage()}>Next</button>