Why can't I change the type of `name` in Firefox web console? [duplicate]

问题

This question already has answers here:

Using the variable “name” doesn't work with a JS object (4 answers)

Closed 7 months ago.

In Firefox web console, why can I change the type of name2

var name2=12
undefined

typeof name2
"number"

name2="hello"
"hello"

typeof name2
"string"

and not for name

typeof name
"string"

name=12
12

typeof name
"string"

?

回答1:

It's explicitly being cast to a string by JavaScript, since it's a readonly property of the global object (thanks Pointy).

来源：https://stackoverflow.com/questions/56086438/why-cant-i-change-the-type-of-name-in-firefox-web-console