let a, b, c;a = b = c = 10;console.log(a); // 10console.log(b); // 10console.log(c); // 10 โ ์๋ชป๋ ์์ (๊ฐ์ฒด๋ฅผ ๊ณต์ ํ๊ฒ๋)let obj1, obj2;obj1 = obj2 = { name: "Alice" };obj1.name = "Bob";console.log(obj2.name); // "Bob" (obj2๋ ์ํฅ์ ๋ฐ์) โ ์ฌ๋ฐ๋ฅธ ๋ฐฉ์(๋ ๋ฆฝํ๋ ๋ฐฉ์)let obj1 = { name: "Alice" };let obj2 = { ...obj1 }; // ๊ฐ์ฒด ๋ณต์ฌobj1.name = "Bob";console.log(obj2.name); // "Alice" (obj2๋ ์ํฅ์ ๋ฐ์ง ์์) ์ฃผ์ํ ์ ๋ถ๋ถ์ ์ผ๋ก๋ ๊ฐ๊ฒฐํ ์ฝ๋๋ฅผ ์์ฑํ์ง๋ง,..