Questions
Find answers to frequently asked development questions. For information about Better Stack products, explore our docs.
How can I do Base64 encoding in Node.js?
In Node.js, you can use the built-in Buffer class to perform Base64 encoding and decoding. The Buffer class provides methods for encoding and decoding data in various formats, including Base64. Her...
Using Node.js as a simple web server
Node.js comes with a built-in module called http that can be used to create a simple web server. Below is a basic example of how to create a simple HTTP server using Node.js: const http = require('...
Using Node.js require vs. ES6 import/export
Node.js uses CommonJS-style require for module loading, while ES6 introduces a native import and export syntax. Each has its own style and use cases. Using require (CommonJS): // Importing a module...
How do I get the path to the current script with Node.js?
In Node.js, you can use the __filename variable to get the absolute path to the current script file, and __dirname to get the absolute path to the directory containing the current script. Here's an...
How can I uninstall npm modules in Node.js?
To uninstall npm modules (packages) in Node.js, you can use the npm uninstall command followed by the name of the module you want to remove. Here are a few examples: Uninstalling a Local Module: To...
How can I get the full object in Node.js's console.log(), rather than '[Object]'?
By default, console.log() in Node.js will display [Object] when trying to log an object. If you want to see the full contents of an object, you can use util.inspect() from the util module, which is...
How to reduce size of node_modules folder?
Reducing the size of the node_modules folder in a Node.js project can be important, especially when deploying applications or managing version control. Here are several strategies you can use to mi...
How to check synchronously if file/directory exists in Node.js?
In Node.js, you can use the fs (file system) module to check synchronously if a file or directory exists. The fs.existsSync() function can be used for this purpose. Here's an example: const fs = re...
How to fix npm throwing error without sudo?
If you are encountering errors when trying to run npm without using sudo, it's likely related to permission issues. Running npm with sudo can lead to problems with file ownership and permissions, a...
How to read environment variables in Node.js
In Node.js, you can read environmental variables using the process.env object. This object provides access to the user environment, including environment variables. Here's a simple example of how y...
How to use multiple node versions on the same machine?
There are several ways to manage multiple Node.js versions on the same machine. Here are two popular tools for achieving this: NVM (Node Version Manager): NVM is a widely used tool for managing mul...
What is the purpose of Node.js module.exports and how do you use it?
In Node.js, module.exports is a special object that is used to define what a module exports as its public interface. It is used to expose functionality from one module (file) to another module, all...
How to get `GET` variables in Express.js on Node.js?
In Express.js, you can access GET (query string) variables using the req.query object. The req.query object contains key-value pairs of the query string parameters in a GET request. Here's an examp...
How do you get a list of the names of all files present in a directory in Node.js?
In Node.js, you can use the fs (file system) module to get a list of file names in a directory. Here's an example using the fs.readdir function: const fs = require('fs'); const directoryPath = '/pa...
How do I debug Node.js applications?
Debugging Node.js applications can be done using various tools and techniques. Here are some common approaches to debug Node.js applications: console.log The simplest form of debugging is using con...
Is there a map function for objects in Node.js?
In JavaScript, the map function is typically used with arrays to transform each element of the array based on a provided callback function. If you want to achieve a similar result with objects, you...
How to write to files in Node.js?
In Node.js, you can use the fs (file system) module to read from and write to files. Here's a basic example of how to write and read files in Node.js using callbacks: const fs = require('fs'); // W...
How can I update Node.js and NPM to their latest versions?
There are several ways to update Node.js to its latest version. Here are three methods: Updating Node.js Using NPM You can use NPM to update Node.js by installing the n package, which will be used ...
How to decide when to use Node.js?
Node.js is a powerful, JavaScript-based runtime environment that has shaped the modern web landscape, enabling developers to build fast, scalable, and efficient web applications. To Node.js or not ...
How to exit in Node.js
Exiting a Node.js application is simple and can be done using the process.exit() method. This method exits from the current Node.js process and takes an exit code, which is an integer. The exit cod...
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