Install Node.js on Linux/Ubuntu/CentOS29 Aug 2024 | 1 min read We can easily install Node.js on linux/ubuntu/centOS/fedora/linuxmint etc. To install Node.js on Linux (Ubuntu) operating system, follow these instructions: 1) Open Ubuntu Terminal (You can use shortcut keys (Ctrl+Alt+T).  2) Type command sudo apt-get install python-software-properties 3) Press Enter (If you have set a password for your system then it will ask for the password) 4) Type the password and press enter  5) Type command sudo apt-add-repository ppa:chris-lea/node.js 6) Press Enter  7) Again Press Enter to continue 8) Type command sudo apt-get update ( Wait for sometime)  9) Type command sudo apt-get install nodejs npm  10) Type command sudo apt-get install nodejs  Installation completed. Now you can check the version of Node by node --version  Check the version of npm by npm -v  Now you can check the node.js in your installed program list by typing this command dpkg --get-selections  Next TopicNode.js First Example |
Testing The Node.js Assert is the most elementary way to write tests. It provides no feedback when running your test unless one fails. The assert module provides a simple set of assertion tests that can be used to test invariants. The module is intended for internal...
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Node.js Package Manager Node Package Manager provides two main functionalities: It provides online repositories for node.js packages/modules which are searchable on search.nodejs.org It also provides command line utility to install Node.js packages, do version management and dependency management of Node.js packages. The npm comes bundled with Node.js installables in versions...
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There can be console-based and web-based node.js applications. Node.js console-based Example File: console_example1.js console.log('Hello JavaTpoint'); Open Node.js command prompt and run the following code: node console_example1.js Here, console.log() function displays message on console. Node.js web-based Example A node.js web application contains the following three parts: Import required modules: The first step is to...
2 min read
What is V8 V8 is an open source JavaScript engine developed by the Chromium project for the Google Chrome web browser. It is written in C++. Now a days, it is used in many projects such as Couchbase, MongoDB and Node.js. V8 in Node.js The module represents interfaces...
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(FS) In Node.js, file I/O is provided by simple wrappers around standard POSIX functions. Node File System (fs) module can be imported using following syntax: Syntax: var fs = require("fs") Node.js FS Reading File Every method in fs module has synchronous and asynchronous forms. Asynchronous methods take a last...
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The term REPL stands for Read Eval Print and Loop. It specifies a computer environment like a window console or a Unix/Linux shell where you can enter the commands and the system responds with an output in an interactive mode. REPL Environment The Node.js or node come...
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The provides methods to deal with query string. It can be used to convert query string into JSON object and vice-versa. To use query string module, you need to use require('querystring'). Methods The utility has four methods. The two important methods are given below. Method Description querystring.parse(str[, sep][, eq][,...
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The Node.js child process module provides the ability to spawn child processes in a similar manner to popen(3). There are three major way to create child process: child_process.exec() method: This method runs a command in a console and buffers the output. child_process.spawn() method: This method launches a...
4 min read
The Node.js console module provides a simple debugging console similar to JavaScript console mechanism provided by web browsers. There are three console methods that are used to write any node.js stream: console.log() console.error() console.warn() Node.js console.log() The console.log() function is used to display simple message on console. File: console_example1.js console.log('Hello JavaTpoint');...
1 min read
Streams are the objects that facilitate you to read data from a source and write data to a destination. There are four types of streams in Node.js: Readable: This stream is used for read operations. Writable: This stream is used for write operations. Duplex: This stream can be...
3 min read
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