❗let redeclaration

redeclares the same identifier with "let" in the same/inner scope.

JS ⟩ variable ⟩ redeclaration ⟩ let

(redeclaration) redeclares the same identifier with let in the same or inner scope.

🔴 主題

• ✅let redeclaration not allowed even in sloppy mode❗️

• ✅let can't shadow parameter even in sloppy mode❗️

👥 相關

• variable declaration ⟩ let

• var redeclaration

• ❗var can shadow parameter even in strict mode❗️

⭐️ 重點

(❗redeclaration ) JS is lenient with var, strict with let.

• var redeclaration applied even in strict mode❗️, even in strict mode❗

• let redeclaration not allowed even in sloppy mode❗️, even in sloppy mode❗