JavaScript 深入解析：Copy by Value、Copy by Reference、Shallow Copy、Deep Copy

Feb 20, 2025 · 2 min read · // 1️⃣ Copy by Value (值複製) // 適用於原始型別 (Primitive Types)：Number, String, Boolean, Null, Undefined, Symbol, BigInt let a = 10; let b = a; // 這裡是值複製，b 獲得 a 的副本 b = 20; // 改變 b 不會影響 a console.log(a); // 10 console.log(b); // 20 // 2️⃣ Copy by Reference...