13 posts tagged with "nodejs"

The package.json file is a crucial component of any Node.js project. It serves as the project's manifest file, providing metadata, configuration, and dependency information. In this article, we'll explore the various keys supported in package.json and their purposes in detail.

Why is package.json Important?​

1. Project Metadata: Provides details like the name, version, and author of the project.
2. Dependency Management: Lists the libraries and tools required for the project.
3. Script Automation: Defines custom commands for automating tasks like testing and building.
4. Compatibility: Specifies compatible Node.js versions or other environment constraints.

In modern software systems, event-driven architectures are commonly used to handle asynchronous processes in a decoupled and efficient manner. One key tool to implement such architectures in Node.js is the EventEmitter class, which enables objects to emit and listen for events. In this article, we'll explore how to build a flexible, reusable, and generic event policy in Node.js using ES6 syntax.

Adhering to a consistent coding style is essential for maintaining readability, reducing bugs, and facilitating collaboration in software development. Below are key coding standards for JavaScript, complete with examples.

Choosing the right package manager is crucial for efficient dependency management, especially for distributed projects handling high loads. While NPM and YARN are well-known options, I’ve found that PNPM consistently outperforms them in several key areas.

Mongoose pre hooks are middleware functions that run before certain operations, such as saving or validating a document. They are useful for a variety of tasks, including data validation, transformation, and managing related data.

Why Use Pre Hooks?​

Pre hooks allow you to:

• Validate or sanitize data before it’s saved to the database.
• Automatically perform actions like hashing passwords.
• Clean up related data before deletion.
• Modify queries before executing them.

This article provides a comprehensive guide on naming conventions for various components in Node.js backend development, including controllers, models, routes, services, middlewares, utilities, configuration files, tests, and environment variables. It emphasizes the importance of consistent naming practices for enhancing code readability and maintainability. The article includes clear examples and explanations for each category, illustrating best practices for file naming, class and function naming, and directory structure. By following these conventions, developers can create well-organized, collaborative, and easily navigable Node.js applications.

Naming Conventions in Node.js Backend Development​

Consistent naming conventions in a Node.js application promote clarity, maintainability, and collaboration among developers. Here's a breakdown of common practices for different components:

Node.js is a powerful, event-driven runtime environment built on Chrome's V8 JavaScript engine. One of its core components is the EventEmitter class, which is fundamental to how Node.js applications handle asynchronous events. In this article, we'll delve into what the EventEmitter is, its advantages and disadvantages, and provide a real-world example of how to use it.

What is EventEmitter?​

The EventEmitter class is part of the Node.js events module and provides a way to handle asynchronous events. It allows objects to emit events and other objects to listen for those events and execute callbacks when they occur. This pattern is essential for building non-blocking, event-driven applications.

Semantic Versioning in Programming Improvement​

In the quick moving universe of programming improvement, overseeing adaptations and conditions is urgent for keeping up with soundness and similarity. Semantic Versioning (SemVer) is a normalized Versioning framework that assists engineers with imparting changes and updates in a reasonable and unsurprising way. This article investigates the standards, benefits, and viable utilizations of Semantic Versioning in programming improvement.

• Prefer const over let. Ditch the var​

Using const means that once a variable is assigned, it cannot be reassigned. Preferring const will help you to not be tempted to use the same variable for different uses, and make your code clearer. If a variable needs to be reassigned, in a for loop, for example, use let to declare it. Another important aspect of let is that a variable declared using it is only available in the block scope in which it was defined. var is function scoped, not block-scoped, and shouldn't be used in ES6 now that you have const and let at your disposal

1. Install Apache and Node.js: Ensure Apache and Node.js are installed. If not, refer to the previous steps to install them.

2. Install mod_proxy and related modules:

   sudo apt install libapache2-mod-proxy-html libxml2-dev
   sudo a2enmod proxy
   sudo a2enmod proxy_http
   sudo systemctl restart apache2