#hydration error with slugs

1 messages · Page 1 of 1 (latest)

mossy eagle
#

when i make a page with a slug after a form submit, it redirects to the new page which just renders the slug.

now if i exit the tab and go back to that page with the slug i get a hydration error and nothing works on that page

fallow wyvernBOT
#

Hi @mossy eagle. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave:

#

Based on the information provided in the extracts, it seems like you're encountering an issue with state persistence in Next.js. When navigating to the same page in Next.js, the page's state will not be reset by default as React does not unmount unless the parent component has changed. This could potentially lead to issues if the state is not managed properly.

Here are a couple of options you could consider:

  1. Manually ensure each state is updated using useEffect. This will reset the state whenever the slug changes:
useEffect(() => {
 setCount(0)
}, [router.query.slug])
  1. Use a React key to tell React to remount the component. To do this for all pages, you can use a custom app:
import { useRouter } from 'next/router'
 
export default function MyApp({ Component, pageProps }) {
 const router = useRouter()
 return <Component key={router.asPath} {...pageProps} />
}

If you're still encountering issues, it might be related to how you're handling redirects after form submission. Here's an example of how you can redirect a client to a specified path or URL once they have submitted a form:

export default async function handler(req, res) {
 const { name, message } = req.body
 try {
 await handleFormInputAsync({ name, message })
 res.redirect(307, '/')
 } catch (err) {
 res.status(500).send({ error: 'failed to fetch data' })
 }
}

If none of these solutions work, it might be helpful to look into the hydration error more closely. Hydration errors in Next.js usually occur when the server-rendered content differs from the client-rendered content. You can use the reportWebVitals function to measure the time it takes for the page to hydrate and render, which might help you identify the source of the issue.