JavaScript var 定义的变量的默认范围是什么？
What is scope default of a variable defined by JavaScript var?
javascript中默认变量的范围是什么？我很困惑，我想知道 Alcanse 有哪些默认变量
我觉得是不是var？
例如：
x = 15 // ??
let y = 22 // let
var j = 33 // var
变量？让？
Scope of the variables declared without var keyword become global irrespective of where it is declared. Global variables can be accessed from anywhere in the web page. Visit Scope for more information.
javascript中默认变量的范围是什么？我很困惑，我想知道 Alcanse 有哪些默认变量 我觉得是不是var？
例如：
x = 15 // ??
let y = 22 // let
var j = 33 // var
变量？让？
Scope of the variables declared without var keyword become global irrespective of where it is declared. Global variables can be accessed from anywhere in the web page. Visit Scope for more information.