列出Node.js中的所有全局变量

I'm trying to list all of the global variables, including those refering to built-in objects.

我正在尝试列出所有全局变量,包括那些引用内置对象的变量。

In Chrome's console I can simply type this and get back all the keys, including things like String, Number, etc.

在Chrome的控制台中,我只需输入此内容即可获取所有密钥,包括字符串,数字等。

However when I do this in Node.js I get much less:

但是,当我在Node.js中执行此操作时,我得到的更少:

> Object.keys(this)
[ 'global',
  'process',
  'GLOBAL',
  'root',
  'Buffer',
  'setTimeout',
  'setInterval',
  'clearTimeout',
  'clearInterval',
  'setImmediate',
  'clearImmediate',
  'console',
  'module',
  'require',
  '_' ]
> this.eval
[Function: eval]

Where is this.eval coming from?

this.eval来自哪里?

3 个解决方案

#1

The built-in properties of the global object are non-enumerable, so Object.keys doesn't return them. You can use Object.getOwnPropertyNames instead.

全局对象的内置属性是不可枚举的,因此Object.keys不会返回它们。您可以使用Object.getOwnPropertyNames。

#2

The following globals() function will get you global namespace object:

以下globals()函数将获取全局命名空间对象:

function globals() { return this; }

With it you can list all variables of global namespace anytime you want:

有了它,您可以随时列出全局命名空间的所有变量:

function varsList() {
  return Object.getOwnPropertyNames(globals());
}

#3

You can use the Object.getOwnPropertyNames(this) .As without passing the "this" as argument or parameter referring to Object owner's properties, the getOwnPropertyNames() function won't return anything.

您可以使用Object.getOwnPropertyNames(this)。如果没有将“this”作为参数或参数引用Object owner的属性,则getOwnPropertyNames()函数将不返回任何内容。

Answering your question as to where the eval comes from check this link out. https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/eval

回答关于评估来自何处的问题,请查看此链接。 https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/eval

#1