When I create a Next.js project with the npx create-next-app command than there is an _app.js file under the pages folder. In which case do I need to prefix a file with an underscore in a Next.js project?
Why does Next.js prefix the app.js with an underscore?
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2 Answers
Next.js uses the App component to initialize pages.
To override the default
App, create the file./pages/_app.js
A custom Document is commonly used to augment your application's <html> and <body> tags.
To override the default
Document, create the file./pages/_document.js
You're only gonna need that prefix in the default nextjs pages like _app.js, the _document.js, etc. you can look it up in the Next.js Docs, I think the prefix is used to avoid routes like "/app" or "/document", and let them free in case you need use them for your project.
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