🔰Node.js

JS ⟩ concepts ⟩ environment ⟩ Node

(a JS runtime environment) builds server-side applications with JavaScript.

⭐️ 重點

in Node.js：

• top-level scope of a file is module scope ( not global scope❗)

• the global object is refered to as "global".

in Node.js：

• each JS file is treated as a module.

• automatically wraps the code of a JS file in a self IIFE with：

  • exports, require, module, __filename, __dirname

  as parameters to the function.

👉 stackoverflow ⟩ What is the 'global' object in NodeJS

v8 is the JS engine used in Chrome / Node.js.

🔴 主題

• scope

  • module scope - top-level scope of a JS file.

  • global - the global object in Node.js environment.

• module

  • each JS file is treated as a module.

📗 參考

• YDKJS: Scope & Closures (v.2) ⟩ Ch. 4 ⟩ Node

📘 手冊

• MDN ⟩ Node.js

• Node.js ⟩ "global"

🗣 討論

• What is the 'global' object in NodeJS