js 中const 定義的值是否能更改

const定義的基本類型不能改變，但是定義的對象是可以通過修改對象屬性等方法來改變的。

1.

const aa=true
aa=false
console.log(aa)
VM1089:2 Uncaught TypeError: Assignment to constant variable.
2.
const aaa=3
aaa=5
console.log(aaa)
VM1152:2 Uncaught TypeError: Assignment to constant variable.
3.
const aaaa='ss'
aaaa='dd'
console.log(aaaa)
VM1194:2 Uncaught TypeError: Assignment to constant variable.
4.
const aaaaa={aa:'dd'}
aaaaa={aa:'bb'}
console.log(aaaaa)
VM1257:2 Uncaught TypeError: Assignment to constant variable.
5.
const aaaaaa={aa:'dd'}
aaaaaa.aa='bb'
console.log(aaaaaa)

 {aa: "bb"}