📘global object

🚧 施工中

JS ⟩ scope ⟩ global ⟩ object

an object that always exists in the global scope. ⭐️ get it with globalThis, regardless of the current context/environment❗

global object's interface depends on the environment：

• in browser： window (a Window object)

• in web worker： self (a WorkerGlobalScope object)

• in Node.js：global (an object called global)

⭐️ 重點

(read-only) global object property❗

• NaN/Infinity/ undefined

in global scope,

• var / function are implemented as global object property❗

• these properties cannot be deleted with delete❗

👉 global var / function is global object property❗️

🔴 主題

🧨 雷區

🗣 討論

📗 參考

📘 手冊

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