front-end-77
/
12-为什么对象和数组常量被修改.html

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta
      name="viewport"
      content="width=device-width, initial-scale=1.0,maximum-scale=1,minimum-scale=1,user-scalable=no"
    />
    <title>12-为什么对象和数组常量被修改.html</title>
    <style>
      * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
      }
    </style>
  </head>
  <body>
    <script>
      // 修改  等于号
      // let a = 1;
      // a = 2; // 修改
      // const b = 3;
      // b = 4; // 修改

      // const obj = { a: 1 };
      // obj.a = 2;

      const list = ['a', 'b'];
      // list.push('c');
      // console.log(list);
      // list[2]='c';
      list = 1;
    </script>
  </body>
</html>