🈯let

declares a block-scoped local variable.

• JS ⟩ variable ⟩ let

• JS ⟩ declaration ⟩ variable ⟩ let

⭐️ ES6 (2015)

(declaration) declares a local variable in block scope.

🧨 雷區

⛔ ReferenceError: cannot access '...' before initialization.

• typeof let/const/class in TDZ gets an error❗️

🔴 主題

⭐️ 重點

👥 相關

📗 參考

📘 手冊