链接组件插值错误 nextjs

Question

I am getting this error in Next.js:

Error: The provided 'href' (/subject/[subject]) value is missing query values (subject) to be interpolated properly. Read more: https://err.sh/vercel/next.js/href-interpolation-failed` .

I have a dynamic page set up as /subject/[subject].tsx . Now in my navigation I have:

<Link href={'/subject/${subject}'} passHref><a>{subject}</a></Link>

It works fine when I access the page with different paths but when I am pressing on a button on the page it throws the error above which I imagine is because the component rerenders. If you go to the page in the error it says: Note: this error will only show when the next/link component is clicked not when only rendered.

I have tried to look for a solution and I tried doing:

<Link href={{pathname: '/subject/[subject]', query: {subject: subject}}}></Link>

but nothing changed. I read the docs and it seems that the as prop is only an optional decorator that is not used anymore so I fail to see how that can help me.

Answer 1

Another possible solution could be redirect using the router.push function:

const myRedirectFunction = function () {

    if (typeof window !== 'undefined') {
        router.push({
            pathname: router.pathname,
            query: {...router.query, myqueryparam: 'myvalue'},
        })
    }

}


return (
  <>
    <button onClick={() => {myRedirectFunction()}}> Continue </button>
  </>

)

It is important to include ...router.query because there if where the [dynamic] current value is included, so we need to keep it.

Reference: https://github.com/vercel/next.js/blob/master/errors/href-interpolation-failed.md

Answer 2

You better do a null || undefined null || undefined check in prior.

Answer 3

@Bentasy, Like you rightly pointed out, any re-render of the page is expecting you to pass in the dynamic route params again. The way I avoided page re-rendering with subsequent clicks on the page was to replace Link tag on the page with a label tag. I was using the Next Link tag to navigate between the tabs on this image which generated this same error. So I replaced the Link tags with label tags and the error was solved.

Answer 4

I got the same issue when trying to redirect user to locale. I did it in useEffect . After investigate I discovered that on first render router.query is empty, so it's missing required field id . I fix it by using router.isReady

 export const useUserLanguageRoute = () => { const router = useRouter() useEffect(() => { const { locales = [], locale, asPath, defaultLocale, pathname, query, isReady // here it is } = router const browserLanguage = window.navigator.language.slice(0, 2) const shouldChangeLocale = isReady && // and here I use it locale.== browserLanguage && locale === defaultLocale && locales.includes(browserLanguage) if (shouldChangeLocale) { router,push( { pathname, query, }, asPath: { locale, browserLanguage } ) } }, [router]) }

Answer 5

I was having the same problem, this is how I solved it.

While pushing something to the router, we need to give the old values in it.

In that:

const router = useRouter()

router.push({
   ...router,
   pathname: '/your-pathname'
})