Executing JavaScript Files with Node.js
📌 Executing Node.js files is done via the terminal using the command `node .js`.
🖥️ The video demonstrates using external terminals like iTerm (for macOS) or Git Bash (for Windows), or the integrated terminal within a code editor like VS Code (accessible via `Ctrl + \``).
📁 To navigate to a specific directory in the terminal, use `cd `, and to create a new directory, use `mkdir `.

Module System in Node.js (Introduction)
🌐 JavaScript execution differs significantly between the browser (where the global object is `window`) and Node.js (which uses a module system).
🔗 In Node.js, files are treated as separate modules; accessing variables or functions from one file in another requires explicit mechanisms.
🔑 To share functionality between files, use the `require` keyword to import and the `module.exports` keyword to export specific functions or variables from a module.

Key Points & Insights
➡️ After running `node `, the output appears in the terminal executing the script, contrasting with browser execution where output goes to the browser console.
➡️ For modules in the same directory, use `require('./filename')` or simply `require('filename')` (without the `.js` extension).
➡️ When exporting, the imported module's contents must be captured into a local variable using assignment, e.g., `const functionName = require('./module')`.

📸 Video summarized with SummaryTube.com on Dec 30, 2025, 17:08 UTC