❗can't delete variable/function❗️

variable / function can't be deleted❗️

JS ⟩ variable ⟩ variable / function can't be deleted❗

Ｑ：Can we delete a variable❓

Ａ：No❗

• sloppy mode：deletion fails silently.

• strict mode：⛔ SyntaxError.

👥 相關

• delete - delete an object's property.

• ⛔delete of an unqualified identifier in strict mode❗️

🗣 討論

• How can I unset a JavaScript variable?

📘 手冊

• delete operator