Frontend Developers Learning Node.js: The Mindset Shift from Browser to Server
This article introduces the necessity and core points for front-end developers to learn Node.js. Based on Google Chrome's V8 engine, Node.js enables JavaScript to run on the server-side, overcoming the limitations of front-end developers in building back-end services and enabling full-stack development. Its core features include "non-blocking I/O" (handling concurrent requests through the event loop), "full-access" environment (capable of operating on files and ports), and the "CommonJS module system". For front-end developers transitioning to back-end roles, mindset shifts are required: changing from the sandboxed (API-limited) runtime environment to a full-access environment; transforming asynchronous programming from an auxiliary task (e.g., setTimeout) to a core design principle (to avoid server blocking); and adjusting from ES Modules to CommonJS (require/module.exports) for module systems. The learning path includes: mastering foundational modules (fs, http), understanding asynchronous programming (callbacks/Promise/async), developing APIs with frameworks like Express, and exploring the underlying principles of tools such as Webpack and Babel. In summary, Node.js empowers front-end developers to build full-stack capabilities without switching programming languages, enabling them to understand server-side logic and expand career horizons. It is a key tool for bridging the gap between front-end and back-end development.
Read MoreWriting Your First Web Server with Node.js: A Quick Start with the Express Framework
This article introduces the method of building a web server using Node.js and Express. Based on the V8 engine, Node.js enables JavaScript to run on the server side, while Express, as a popular framework, simplifies complex tasks such as routing and request handling. For environment preparation, first install Node.js (including npm), and verify it using `node -v` and `npm -v`. Next, create a project folder, initialize it with `npm init -y`, and install the framework with `npm install express`. The core step is writing `server.js`: import Express, create an instance, define a port (e.g., 3000), use `app.get('/')` to define a GET request for the root path and return text, then start the server with `app.listen`. Access `http://localhost:3000` to test it. Extended features include adding more routes (e.g., `/about`), dynamic path parameters, returning JSON (`res.json()`), and hosting static files (`express.static`). The key steps are summarized as: installing tools, creating a project, writing routes, and starting the test, laying the foundation for subsequent learning of middleware, dynamic routing, etc.
Read MoreNode.js npm Tools: A Comprehensive Guide from Installation to Package Management
This article introduces the core knowledge of Node.js and npm. Node.js is a JavaScript runtime environment based on Chrome's V8 engine, and npm is its default package management tool for downloading, installing, and managing third-party code packages. **Installation**: Node.js can be installed on Windows, Mac, and Linux systems via the official website or package managers (npm is installed alongside Node.js). After installation, verify with `node -v` and `npm -v`. **Core npm Functions**: - Initialize a project with `npm init` to generate `package.json` (project configuration file). - Install dependencies: local (default, project-only) or global (`-g`, system-wide); categorized as production (`--save`) or development (`--save-dev`) dependencies. - Manage dependencies: view, update, uninstall (`npm uninstall`), etc. **Common Commands**: `npm install` (Install), `npm list` (View), `npm update` (Update), etc. For slow domestic access, accelerate with Taobao mirror (`npm config set registry`) or cnpm. **Notes**: Avoid committing `node_modules` to Git, use version numbers (`^` or `~`) reasonably, and prioritize local dependency installation. npm is a core tool for Node.js development; mastering its usage enhances efficiency.
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