是否有表示本地范围的Javascript变量？像全球？ [英] Is there a Javascript variable that represents local scope? Like global?

问题描述

global 是一个包含任何全局变量的对象（至少在Node.js中，它们位于窗口在浏览器中）。

global is an object containing any global variables (at least in Node.js, they're in window in the browser).

是否有代表当前范围的类似变量？局部变量不会显示在全局中（有充分理由:)）

Is there a similar variable that represents the current scope? Local variables don't show up in global (for a good reason :) )

asdf = "hello";
var local = "hello";

console.log(global); // includes asdf
console.log(???);    // includes local?

推荐答案

是否有对象代表本地范围？

是的。有。

Is there an object represents the local scope?

Yes. There is.

没有。你不能。

为什么？
JavaScript只有函数作用域 - 这是执行上下文。在执行上下文中，激活对象（也称为调用对象）用于创建局部变量属性。但是，

Why? JavaScript has only function scope - which is the execution Context. Within the execution Context, an Activation object(also known as call object) is used to create local variables as its property. However,

...它不是普通的对象，因为它没有原型（至少没有定义的原型）而且它不能是由javascript代码直接引用。

...it is not a normal object as it has no prototype (at least not a defined prototype) and it cannot be directly referenced by javascript code.

参考

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