What are Global objects in Node.js?

 Node.js has some Global objects which are available in all modules. Some of these objects are not actually in global scope but in the module scope.

  • __dirname: The directory name of the current module. This the same as the path.dirname() of the __filename.
  • __filename: The file name of the current module. This is the resolved absolute path of the current module file.
  • exports: A reference to the module.exports that is shorter to type. exports is not actually a global but rather local to each module.
  • require: To require modules. require is not actually a global but rather local to each module.

Comments

Post a Comment

Popular posts from this blog

What test framework did you use to test your nodejs applications

1) Mocha - Mocha is a feature-rich JavaScript test framework running on  Node.js  and in the browser, making asynchronous testing  simple  and  fun .  Mocha tests run serially, allowing for flexible and accurate reporting, while mapping uncaught exceptions to the correct test cases Simple Usage - $ npm install mocha $ mkdir test $ $EDITOR test/test.js # or open with your favorite editor In your editor: var assert = require ( 'assert' ) ; describe ( 'Array' , function ( ) { describe ( '#indexOf()' , function ( ) { it ( 'should return -1 when the value is not present' , function ( ) { assert . equal ( [ 1 , 2 , 3 ] . indexOf ( 4 ) , - 1 ) ; } ) ; } ) ; } ) ; Back in the terminal: $ ./node_modules/mocha/bin/mocha Array #indexOf() ✓ should return -1 when the value is not present 1 passing (9ms) Set up a test script in package.json: "scripts" : { "test" : "m...
Read more

What is V8 Engine? What is the relationship between Node.js and V8?

  V8 Engine is Google’s open source javascript and written in C++ and used inside Google Chrome. It was designed for increasing the performance of JavaScript execution inside web browsers. V8 is the Javascript engine inside of node.js that parses and runs your Javascript. The same V8 engine is used inside of Chrome to run javascript in the Chrome browser. Google open-sourced the V8 engine and the builders of node.js used it to run Javascript in node.js.
Read more