未绑定(即未赋值)到变量的 JavaScript 字面量(字符串、数字)会发生什么?
// A comment
"Practically, also a comment"
var assigned = "something"
53
423.0022
NaN
"does it impact performance"
// or is it treated just like a comment?
浏览器似乎忽略它们,但我在规范中找不到具体的规则。