如果条件在 React 中为真,如何从循环中跳过特定索引?
How to skip a particular index from a loop if a condition is truthy in React?
我有一系列来自 CMS 的博客,它呈现出带有 images/content 等的博客页面
在这个博客页面的底部,我建议用户从数组中的博客列表中结帐另外 2 个博客。
很简单,我想从数组中随机选择 2 个博客,但要确保其中一个不是我所在的当前博客页面,我快要实现了,但还不太明白在 useEffect 中使用 for 循环。
我想我可以检查博客的 uid post,如果它与当前 url 端点匹配,则使用 next & prev from state 作为数组的索引跳过它。
这是我的反应文件:
export default function Case({ data, cases }) {
const [next, setNext] = useState(0);
const [prev, setPrev] = useState(0);
const { results } = cases;
console.log(results);
useEffect(() => {
let currentUrl = window.location.pathname;
currentUrl = currentUrl.split('/')[2];
console.log(currentUrl);
for (let i = 0; i < results.length; i++) {
if (results[i].uid === currentUrl) {
// how to solve here?
}
}
}, []);
return (
<div className='h-full w-full bg-white'>
<div className='bg-gray-100'>
<div className='max-w-5xl mx-auto bg-white py-20 -mt-16 rounded-lg shadow-lg px-8 z-10 relative'>
<div className='flex flex-col md:flex-row justify-around md:space-x-36'>
<div className=''>
<p className='text-3xl text-left'>
{RichText.asText(data.client)}
</p>
<p className='text-xl text-left font-light mt-6'>
{RichText.asText(data.title)}
</p>
</div>
<div className='md:w-1/3 flex flex-col justify-between mt-6 md:mt-0'>
<p className='text-3xl text-blue-500 text-left'>
{RichText.asText(data.overview)}
</p>
<div className='flex space-x-28 items-start mt-8 md:mt-20'>
<div>
<p className='text-xl font-bold'>Category</p>
<p className='mt-8'>{RichText.asText(data.category)}</p>
</div>
<div>
<p className='text-xl font-bold'>Date</p>
<p className='mt-8 whitespace-nowrap'>
{moment(data.date).format('MMM YYYY')}
</p>
</div>
</div>
</div>
</div>
</div>
<div>
<p className='text-3xl text-center'>Want to learn more?</p>
<p className='text-2xl font-light text-center mt-4'>
Check out our other solutions!
</p>
</div>
<div
className='bg-white w-full relative flex justify-center'
style={{ height: '70vh' }}>
<div className='absolute -top-1/3 flex flex-col md:flex-row gap-6'>
<div className='text-center px-8 md:px-0'>
<Link href={`/case-studies/${results[next].uid}`}>
<button className='py-2 px-6 rounded-md bg-blue-500 text-white mt-8'>
{' '}
Read more
</button>
</Link>
</div>
<div className='text-center px-8 md:px-0'>
<Link href={`/case-studies/${results[prev].uid}`}>
<button className='py-2 px-6 rounded-md bg-blue-500 text-white mt-8'>
Read more
</button>
</Link>
</div>
</div>
</div>
</div>
);
}
我相信它非常简单,但我们将不胜感激任何帮助!
提前致谢。
我不确定 uid
和 currentUrl
是否是正确的 properties
进行比较,但您需要过滤 results
并且它将是最好使用js es6数组方法。
至少逻辑可以帮助您理解。
另外,我不确定您是否需要 useEffect
。
const { results } = cases;
console.log(results);
let currentUrl = window.location.pathname;
currentUrl = currentUrl.split('/')[2];
console.log(currentUrl);
const filteredResults = results && results.filter(result=>result.uid !== currentUrl)
我有一系列来自 CMS 的博客,它呈现出带有 images/content 等的博客页面
在这个博客页面的底部,我建议用户从数组中的博客列表中结帐另外 2 个博客。
很简单,我想从数组中随机选择 2 个博客,但要确保其中一个不是我所在的当前博客页面,我快要实现了,但还不太明白在 useEffect 中使用 for 循环。
我想我可以检查博客的 uid post,如果它与当前 url 端点匹配,则使用 next & prev from state 作为数组的索引跳过它。
这是我的反应文件:
export default function Case({ data, cases }) {
const [next, setNext] = useState(0);
const [prev, setPrev] = useState(0);
const { results } = cases;
console.log(results);
useEffect(() => {
let currentUrl = window.location.pathname;
currentUrl = currentUrl.split('/')[2];
console.log(currentUrl);
for (let i = 0; i < results.length; i++) {
if (results[i].uid === currentUrl) {
// how to solve here?
}
}
}, []);
return (
<div className='h-full w-full bg-white'>
<div className='bg-gray-100'>
<div className='max-w-5xl mx-auto bg-white py-20 -mt-16 rounded-lg shadow-lg px-8 z-10 relative'>
<div className='flex flex-col md:flex-row justify-around md:space-x-36'>
<div className=''>
<p className='text-3xl text-left'>
{RichText.asText(data.client)}
</p>
<p className='text-xl text-left font-light mt-6'>
{RichText.asText(data.title)}
</p>
</div>
<div className='md:w-1/3 flex flex-col justify-between mt-6 md:mt-0'>
<p className='text-3xl text-blue-500 text-left'>
{RichText.asText(data.overview)}
</p>
<div className='flex space-x-28 items-start mt-8 md:mt-20'>
<div>
<p className='text-xl font-bold'>Category</p>
<p className='mt-8'>{RichText.asText(data.category)}</p>
</div>
<div>
<p className='text-xl font-bold'>Date</p>
<p className='mt-8 whitespace-nowrap'>
{moment(data.date).format('MMM YYYY')}
</p>
</div>
</div>
</div>
</div>
</div>
<div>
<p className='text-3xl text-center'>Want to learn more?</p>
<p className='text-2xl font-light text-center mt-4'>
Check out our other solutions!
</p>
</div>
<div
className='bg-white w-full relative flex justify-center'
style={{ height: '70vh' }}>
<div className='absolute -top-1/3 flex flex-col md:flex-row gap-6'>
<div className='text-center px-8 md:px-0'>
<Link href={`/case-studies/${results[next].uid}`}>
<button className='py-2 px-6 rounded-md bg-blue-500 text-white mt-8'>
{' '}
Read more
</button>
</Link>
</div>
<div className='text-center px-8 md:px-0'>
<Link href={`/case-studies/${results[prev].uid}`}>
<button className='py-2 px-6 rounded-md bg-blue-500 text-white mt-8'>
Read more
</button>
</Link>
</div>
</div>
</div>
</div>
);
}
我相信它非常简单,但我们将不胜感激任何帮助!
提前致谢。
我不确定 uid
和 currentUrl
是否是正确的 properties
进行比较,但您需要过滤 results
并且它将是最好使用js es6数组方法。
至少逻辑可以帮助您理解。
另外,我不确定您是否需要 useEffect
。
const { results } = cases;
console.log(results);
let currentUrl = window.location.pathname;
currentUrl = currentUrl.split('/')[2];
console.log(currentUrl);
const filteredResults = results && results.filter(result=>result.uid !== currentUrl)