JavaScript 表达式
默认的求值器支持 JavaScript 表达式的直接求值:
> 1 + 1
2
> const m = 2
undefined
> m + 1
3
除非在块或函数内另有作用域,否则隐式声明或使用 const
、let
或 var
关键字声明的变量在全局作用域内声明。
The default evaluator supports direct evaluation of JavaScript expressions:
> 1 + 1
2
> const m = 2
undefined
> m + 1
3
Unless otherwise scoped within blocks or functions, variables declared
either implicitly or using the const
, let
, or var
keywords
are declared at the global scope.