React-State(4)

State
https://ko.reactjs.org/docs/faq-state.html

컴포넌트 State – React

 

얕은 복사, 깊은 복사

 <script>
      //1. 얕은 복사,원시타입
      let a = "ggombee";
      let b = a;
      a = "sara";
      document.write(a + "<br>");  //sara
      document.write(b + "<br>");  //ggombee

      //2. 깊은 복사,참조타입
      let profileA = { name: "ggombee" };
      let profileB = profileA;
      profileA.name = "sara";

      document.write(profileA.name + "<br>"); //sara
      document.write(profileB.name + "<br>"); //sara
    </script>

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