🔰lvalue

LHS reference of variable/property/element.

JS ⟩ statement ⟩ expression ⟩ operator ⟩ term ⟩ lvalue

(expression)

variable / (object) property / (array) element that appears on the left side of an assignment.

🈯 synonyms： "assignment target"

⭐️ 重點

delete expects its operand to be an lvalue, if it is not an lvalue, the operator takes no action and returns true.

lvalue can be used in for-of / for-in loop.

👥 相關

• LHS reference

• lvalue can be used in a for-of / for-in loop.

📗 參考

• JavaScript: The Definitive Guide ⟩

  • 4.7.1

  • 4.13.4 The delete Operator

📘 手冊

• for...in

  • ⟩ parameters (for "assignment target")