Node.js global objects are global in nature and available in all modules. You don't need to include these objects in your application; rather they can be used directly. These objects are modules, functions, strings and object etc. Some of these objects aren't actually in the global scope but in the module scope.
A list of Node.js global objects are given below:
It is a string. It specifies the name of the directory that currently contains the code.
File: global-example1.js
console.log(__dirname);
Open Node.js command prompt and run the following code:
node global-example1.js
It specifies the filename of the code being executed. This is the resolved absolute path of this code file. The value inside a module is the path to that module file.
File: global-example2.js
console.log(__filename);
Open Node.js command prompt and run the following code:
node global-example2.js
Click here to get details of Console class. http://www.rookienerd.com/nodejs-console
Click here to get details of Buffer class. http://www.rookienerd.com/nodejs-buffers
Click here to get details of Timer functions. http://www.rookienerd.com/nodejs-timer