1

We can we use global.console.log('A') should mean that console is a property of the global object. But using console.log(global), I don't see any property named 'console' ?

CertainPerformance
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user123456789
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1 Answers1

4

It's not enumerable, so it doesn't show up when just logging the plain global object. But it's still directly on global:

>global.hasOwnProperty('console')
true
> Object.getOwnPropertyDescriptor(global, 'console')
{
  value: {
    ...
  },
  writable: true,
  enumerable: false,
  configurable: true
}

If you want to examine all properties on an object, use Object.getOwnPropertyNames:

Object.getOwnPropertyNames(global)

(There are lots of non-enumerable properties on global, and only a few enumerable ones)

CertainPerformance
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  • What about the second question ? – user123456789 Nov 11 '19 at 09:56
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    Different questions should be separated into different posts, but the answer to your second question is https://stackoverflow.com/questions/19850234/node-js-variable-declaration-and-scope - the top level of a module is *not* the global scope – CertainPerformance Nov 11 '19 at 10:10