useRouter/withRouter receive undefined on query in first render
I got a problem with my dynamic route. It look like this [lang]/abc I am trying to get query value from [lang] but when I using useRouter/withRouter i got query during 2-3 render of page ( on first i got query.lang = undefined ). its possible to get in 1 render or use any technique ?
It's impossible to get the query value during the initial render. Statically optimized pages are hydrated without the route parameters, so the query is an empty object ({}). Next.js will populate the query after the page has been hydrated. Next.js 10.0.5 and up To determine if the route params are ready, you can use router.isReady inside a useEffect hook. For an example, see the answer provided by @doxylee. Before Next.js 10.0.5 At first render of a dynamic route router.asPath and router.route are equal. Once query object is available, router.asPath reflects it. You can rely on the query value within a useEffect hook after asPath has been changed. const router = useRouter(); useEffect(() => { if (router.asPath !== router.route) { // router.query.lang is defined } }, [router]) GitHub Issue - Add a "ready" to Router returned by "useRouter"
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