Enable the `.md` Markdown File Extension for Next.js Pages
The defaults for the Next.js mdx-js plugin only allow you to use files ending in .mdx. You probably already have many .md files from existing projects, so this lesson walks you through enabling an .md files as well with a couple of configuration steps.
Instructor: [0:00] To use the .md extension, like contacts.md, from markdown files rather than the MDX, so I'll create this contact markdown file. We haven't properly configured it yet to support contact as a URL. We do that by going back into our config, and we need to support the md page extension.
[0:26] We also need to configure the Next MDX plugin with an object, with a property called extension. This is React JSX, so we'll start with // and we want files that end in .md. $ is the end of the file name. We want md to come before that. Because it's the extension, we'll use a dot, which we have to escape with a backslash. I'll hit save here.
[0:53] Next picks up on our change, refreshes and renders out our contact page. Now it should break our content page. If you want to support .md and .mdx, type in x with a question mark, which makes that x optional. Hit save there. It catches that change and renders out our page.
[1:14] Now, content and contact, both work because our React JSX for the extension reads files that end in .md with an optional x on it. Our page extensions support js, mdx, and md. We can use js, mdx, or md.