"this" keyword in Node.js environment

[muttubk]

In a Node.js environment, when executing code outside of any function (i.e., in the global scope), this does not refer to the global object directly. Instead, it refers to the “module.exports” object, which is specific to the current module.

1. Outside Function:
   If you use console.log(this) outside any function (i.e., in the global scope or in a module), it will print the value of this in the context of the module.
   In Node.js, the value of this in the module scope is equivalent to module.exports, which typically contains the exports of the module.
   Therefore, console.log(this) outside the function will print the exports of the current module.

2. Inside Function:
   If you use console.log(this) inside a function, it will print the value of this in the context of that function.
   Since we have already established that this inside a function refers to the global object in Node.js, console.log(this) inside the function will print the global object.

So, this === module.exports :

The following example shows how modifying this or module.exports outside the function affects each other:

[robheyays]

Hello, do you have a question, all I see is an illustration.

[muttubk]

I didn’t get why this value is module.exports correctly though. Could you help me understand?

[robheyays]

Ok , here is some information that you could look over with the issue.

Module.exports is an object that represents the current module. It is used to export variables, functions, classes, and objects from a module so that they can be used in other modules.

When you assign a value to module.exports, you are making that value available to other modules that import your module. For example, if you have a module called my-module.js and you assign the value 10 to module.exports, then any other module that imports my-module.js will be able to access the value 10 as myModule.exports.

In the example you provided, the value of module.exports is an object that contains a single property, name. This means that any other module that imports my-module.js will be able to access the value of the name property as myModule.exports.name.

Here is an example of how to use module.exports to export a value from a module:

// my-module.jsmodule.exports = {  name: 'My Module',};

Use code with caution.

Learn more

Here is an example of how to import the value from my-module.js and use it in another module:

// another-module.jsconst myModule = require('./my-module.js');console.log(myModule.exports.name); // Outputs: 'My Module'

Use code with caution.

Learn more

[robheyays]

Running programs in a node.js environment have a lot of tools/commands that you can use to check logs or find depreciation issues.

[muttubk]

And also why not this case in browser?