Can you provide more details? What's inside your page.jsx? What URL are you trying etc etc

first of all , it is my first localhost server even when I tried code in docs , it is not workin : export default function Page({ params }: { params: { slug: string } }) {
return <div>My Post: {params.slug}</div>
}

for example I tried like here https://nextjs.org/docs/app/building-your-application/routing/dynamic-routes

Like mentioned, what’s the URL you are trying to access?

I see nothing nothing wrong. Any error on the console when you try to access that URL? There are some error notifications in your code editor

I'm sorry but what "not working" does mean? what error you got in the console? What OS are you using? Node version? etc etc... I would love to help, but need more info.

and what is your file structure for this?