What do you understand by global objects in Node.js?

In Node.js, Globals are the objects which are global in nature and are available in all the modules of the application. You can use these objects directly in your application, rather than having to include them explicitly. The global objects can be modules, functions, strings, object, etc. Moreover, some of these objects can be in the module scope instead of global scope.

Comments

Post a Comment

Popular posts from this blog

Which node logger did you use in your project?

Following are the common logger modules: 1) logger SUMMARY A simple logging library that combines the simple APIs of Ruby's logger.rb and browser-js console.log() USAGE A logger has 5 different levels of logging in a specific order: 'fatal', 'error', 'warn', 'info', 'debug' Each of these log levels has its own method on the logging instance. You can set the maximum log level on a logger at runtime. By default, a logger writes to STDOUT, but given a writeable file path, it will log directly to a file. Instantiation: // node/common.js style var logger = require('./logger').createLogger(); // logs to STDOUT var logger = require('./logger').createLogger('development.log'); // logs to a file 2)  simple-node-logger A simple multi-level logger for console, file, and rolling file appenders. Features include: levels: trace, debug, info, warn, error and fatal levels (plus all and off) flexible ap...
Read more

What is promise, promise.all and promise.race? How do you chain promises?

A promise is an object that may produce a single value some time in the future : either a resolved value, or a reason that it’s not resolved (e.g., a network error occurred). A promise is an object which can be returned synchronously from an asynchronous function. It will be in one of 3 possible states: Fulfilled:   onFulfilled()  will be called (e.g.,  resolve()  was called) Rejected:   onRejected()  will be called (e.g.,  reject()  was called) Pending:  not yet fulfilled or rejected A promise is  settled  if it’s not pending (it has been resolved or rejected). Sometimes people use  resolved  and  settled  to mean the same thing:  not pending . Once settled, a promise can not be resettled. Calling  resolve()  or  reject()  again will have no effect. The immutability of a settled promise is an important feature. Promises following the spec must follow a specific set of rules: A promise or...
Read more