Skip to content

README.md

Latest commit

 

History

History
64 lines (39 loc) · 2.05 KB

README.md

File metadata and controls

64 lines (39 loc) · 2.05 KB

Browser JavaScript vs Node.js

Browser JavaScript designed to execute JavaScript in web browsers It’s focused on frontend development while, Node.js is a runtime envrionment for executing JavaScript code on server-side. It’s focused on backend development tasks like handling HTTP requests, file I/O, and building APIs.

APIs and Features Differences

Browser JavaScript:

Provides browser-specific APIs like:

  • DOM Manipulation (document).
  • Event Handling (addEventListener).
  • Fetch API for making HTTP requests.
  • Web storage API (localstorage, sessionStorage).
  • Restricted access to system resources for security.

Node.js:

Provides sever-specific APIs like:

  • File System (fs) for reading/writing files.
  • HTTP Module (http) for building servers.
  • Streams for processing data efficiently.
  • Process Management (process, child_process).
  • No support for browser-specific features like DOM or window.

Concurrency and Asynchronous Handling

Browser JavaScript:

  • Single-threaded with asynchronous operations managed via the event loop.
  • Supports Web Workers for multi-threading.

Node.js:

  • Also single-threaded but uses libuv for managing asynchronous I/O tasks.
  • Supports Worker Threads for multi-threading and clustering for scaling across CPU cores.

Global Object

Browser JavaScript:

  • The global object is window. Variables declared globally are accessible through window.

Node.js:

  • The global object is global. However, global variables are not added to global unless explicitly declared.

Module system

Browser JavaScript:

  • Modules in the browser can be import using script tag with the type attribute set to module and the src attribute set to the path of the module file.
<script type="module" src="./some-dir/module.js"></script>
  • Supports ES6 Modules (import/export) for modular development.

Node.js:

  • Uses CommonJS Modules (require/module.exports).
  • Modern Node.js supports ES6 Modules with .mjs files or "type": "module" in package.json.