The relationship between pages/_app.js and pages/index.js in a Next.js application is foundational to how Next.js handles page rendering and application structure. Here's an overview of their roles and interplay: pages/_app.js - The Custom App Component : This is a special file in Next.js that allows you to override the default App component used by Next.js. It's the top-level component that gets executed for every page visit. It's useful for implementing application-wide page layouts or injecting additional data into pages. Whatever you include in _app.js (like global CSS, layout components, context providers) is accessible in every page of your application. It receives a Component prop, which is the active page being rendered (e.g., the content of pages/index.js or any other page), and pageProps , which are props specific to each page. pages/index.js - A Page Component : This file represents the homepage of your Next.js application. It's what gets rendered when...
1. What is Node.js? Like Browser is one host environment of that Javascript of frontend, Node.js is a host environment for Javascript of backend Chrome's Javascript engines V8 has all been cloned and is now maintained as a standalone project working without a browser and enriched with some extra APIs that is basically Node.js, it allows us to run Javascript outside of the browser Compare to V8, Node.js dropped some APIs(e.g. DOM API), and added some APIs(e.g. Filesystem) 2. A Simple Node.js Code Node.js code are just normal javascript code with extra node api In Node.js runtime environment, there are a few globally function (e.g., require) Between different Node.js module (javascript file), we can transfer object through require and export A simple Node.js Code: const fs = require("fs"); const userName = "Light"; fs.writeFile("./user-data.txt", "Name: " + userName, (error) => { if (error) { console.log(error); return; } ...
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