如何仅使用useState更新单击的元素

Question

我有一个产品结构，它被每个新产品动态地采用。

所以在产品的结构中，我有一个添加到购物车的图标，我只想用一个微调器svg来替换点击的图标。但问题是，所有的图标都在改变，而不仅仅是特定的元素，所以我如何才能只更新点击项目的状态，而不使用图标数组或任何使其静态的东西。

import React, { useState } from "react";
import { FiShoppingCart } from "react-icons/fi";
const Carpet = ({ products, onAddToCart }) => {
const [loading, setLoading] = useState(<FiShoppingCart />);
return (
<>
{products.map((carpet) => (
<div
className="shrink-0 cursor-pointer w-[18rem] sm:max-w-sm"
key={carpet.id}
>
<div className="relative">
<img
src={carpet.image.url}
alt="carpet"
className="object-cover h-[18em] w-80 rounded-xl"
/>
<div
onClick={() => {
setLoading(
<svg
aria-hidden="true"
class="w-6 h-6 animate-spin text-slate-300 fill-blue-500"
viewBox="0 0 100 101"
fill="none"
xmlns="http://www.w3.org/2000/svg"
>
<path
d="M100 50.5908C100 78.2051 77.6142 100.591 50 100.591C22.3858 
100.591 0 78.2051 0 50.5908C0 22.9766 22.3858 0.59082 50 
0.59082C77.6142 0.59082 100 22.9766 100 50.5908ZM9.08144 
50.5908C9.08144 73.1895 27.4013 91.5094 50 91.5094C72.5987 91.5094 
90.9186 73.1895 90.9186 50.5908C90.9186 27.9921 72.5987 9.67226 50 
9.67226C27.4013 9.67226 9.08144 27.9921 9.08144 50.5908Z"
fill="currentColor"
/>
<path
d="M93.9676 39.0409C96.393 38.4038 97.8624 35.9116 97.0079 
33.5539C95.2932 28.8227 92.871 24.3692 89.8167 20.348C85.8452 
15.1192 80.8826 10.7238 75.2124 7.41289C69.5422 4.10194 63.2754 
1.94025 56.7698 1.05124C51.7666 0.367541 46.6976 0.446843 41.7345 
1.27873C39.2613 1.69328 37.813 4.19778 38.4501 6.62326C39.0873 
9.04874 41.5694 10.4717 44.0505 10.1071C47.8511 9.54855 51.7191 
9.52689 55.5402 10.0491C60.8642 10.7766 65.9928 12.5457 70.6331 
15.2552C75.2735 17.9648 79.3347 21.5619 82.5849 25.841C84.9175 
28.9121 86.7997 32.2913 88.1811 35.8758C89.083 38.2158 91.5421 
39.6781 93.9676 39.0409Z"
fill="currentFill"
/>
</svg>
);
setTimeout(function () {
setLoading(<FiShoppingCart />);
}, 1000);
onAddToCart(carpet.id, 1);
}}
className={
"absolute bg-white text-slate-500 hover:bg-slate-200 right-[1rem] bottom- 
[1rem] p-4 text-xl rounded-full"
}
>
{loading}
</div>
</div>
<div className="flex justify-between p-2 py-4">
<div>
<h3 className="dark:text-white font-bold text-xl">
{carpet.name}
</h3>
<p
dangerouslySetInnerHTML={{ __html: carpet.description }}
className="text-slate-400 text-sm"
/>
</div>
<div className="bg-gradient-to-r from-orange-500 to-yellow-500 flex items- 
center justify-center h-10 px-5 rounded-lg font-bold ">
${carpet.price.formatted}
</div>
</div>
</div>
))}
</>
);
};
export default Carpet;

Answer 1

您可以通过其id来识别加载产品，并相应地设置图标：

import React, { useState } from 'react';
import { FiShoppingCart } from 'react-icons/fi';
const Carpet = ({ products, onAddToCart }) => {
const [loading, setLoading] = useState(-1);
const handleClick = (id) => {
setLoading(id);
setTimeout(function () {
setLoading(-1);
}, 1000);
onAddToCart(id, 1);
};
return (
<>
{products.map((carpet) => (
<div
className='shrink-0 cursor-pointer w-[18rem] sm:max-w-sm'
key={carpet.id}
>
<div className='relative'>
<img
src={carpet.image.url}
alt='carpet'
className='object-cover h-[18em] w-80 rounded-xl'
/>
<div
onClick={() => handleClick(carpet.id)}
className='absolute bg-white text-slate-500 hover:bg-slate-200 right-[1rem] bottom-[1rem] p-4 text-xl rounded-full'
>
{loading === carpet.id ? (
<your-loading-svg />
) : (
<FiShoppingCart />
)}
</div>
</div>
<div className='flex justify-between p-2 py-4'>
<div>
<h3 className='dark:text-white font-bold text-xl'>
{carpet.name}
</h3>
<p
dangerouslySetInnerHTML={{ __html: carpet.description }}
className='text-slate-400 text-sm'
/>
</div>
<div
className='bg-gradient-to-r from-orange-500 to-yellow-500 flex items- 
center justify-center h-10 px-5 rounded-lg font-bold '
>
${carpet.price.formatted}
</div>
</div>
</div>
))}
</>
);
};
export default Carpet;