Javascript

How to Conditionally Add a Property to an Object in JavaScript

Monday, January 13, 2025

how to conditionally add a property to object

In JavaScript, dynamically adding properties to objects based on conditions is a common task. Whether you’re working with APIs, creating dynamic configurations, or simply managing data, knowing how to conditionally add properties can streamline your code. In this article, we’ll explore different methods to achieve this efficiently, ensuring you write clean, idiomatic code.

What is globalThis in JavaScript?

Łukasz Holeczek

Wednesday, January 8, 2025

#what-is #javascript #node.js

When working with JavaScript, the global object is a critical concept that provides access to the environment’s core functionalities. However, inconsistencies across different JavaScript environments, such as browsers, Node.js, and web workers, have long made accessing the global object challenging. To address this, the globalThis object was introduced as a unified mechanism to reliably access the global object in a consistent manner, regardless of the environment. This article explores what globalThis is, why it’s essential, and how to use it effectively.

Understanding the Difference Between NPX and NPM

Łukasz Holeczek

Thursday, January 2, 2025

#what-is #javascript #node.js

In the ever-evolving landscape of JavaScript development, managing packages efficiently is crucial. Whether you’re a seasoned developer or just starting, understanding the tools at your disposal can significantly impact your workflow. Two such essential tools are npm and npx. While both are integral to the Node Package Manager ecosystem, they serve distinct purposes. This article delves into the difference between npm and npx, elucidating their roles, best practices, and practical applications to enhance your development experience.

Understanding the difference between `for...in` and `for...of` statements in JavaScript

Łukasz Holeczek

Friday, December 6, 2024

#what-is #javascript

As JavaScript continues to evolve, understanding the nuances of its looping mechanisms becomes essential for developers aiming to write efficient and bug-free code. Two commonly used looping statements, for...in and for...of, often lead to confusion due to their overlapping use cases. Grasping the difference between these loops is crucial for iterating over objects and iterable objects effectively, ensuring optimal performance and maintainability in your codebase.

How to convert a string to boolean in JavaScript

Łukasz Holeczek

Wednesday, November 13, 2024

#how-to #javascript

Working with different data types is a common task in JavaScript development. One frequent requirement is to convert a string to a boolean value. This article explores various methods to achieve this conversion, ensuring your code handles truthy values and false conditions accurately.

How to validate an email address in JavaScript

Łukasz Holeczek

Friday, September 20, 2024

#how-to #javascript

In web development, ensuring that user input is formatted correctly is crucial for maintaining data integrity and enhancing user experience. One common requirement is email validation. Implementing email validation in JavaScript allows developers to provide immediate feedback to users, ensuring that the email addresses entered are valid and correctly formatted. In this guide, we’ll explore how to implement email validation in JavaScript, using regular expressions and other techniques to validate email addresses effectively. We will also provide practical examples and methods using JavaScript code that you can directly copy and paste.

What is the difference between typeof and instanceof in JavaScript

Łukasz Holeczek

Tuesday, September 17, 2024

#what-is #javascript

difference between typeof and instanceof

As a JavaScript developer, you might often wonder how to correctly identify the type of a variable or determine if an object belongs to a particular class. Two operators that help with this are typeof and instanceof. While they may seem similar, they serve different purposes and work in distinct ways. This article will break down these operators, explain their differences, and guide you on when to use each.

What are the three dots `...` in JavaScript do?

Łukasz Holeczek

Tuesday, September 3, 2024

#how-to #javascript

In JavaScript, the three dots operator (...) is a versatile feature introduced in ES6. Known as the spread operator and rest parameter, these three dots have transformed how developers handle arrays, objects, and function parameters. Understanding this syntax is crucial for any software developer looking to write clean, efficient, and maintainable code. In this article, we’ll explore the various ways you can use the spread operator, spread syntax, and rest operator in your JavaScript code.

How to replace all occurrences of a string in JavaScript?

Łukasz Holeczek

Saturday, August 31, 2024

#how-to #javascript

When working with JavaScript, you often must replace all occurrences of a specific substring within a string. This is a common task in various scenarios, such as formatting user input, modifying text content, or processing data. However, the native replace method in JavaScript only replaces the first occurrence of the pattern by default. This article will guide you through different techniques to replace all occurrences of a string in JavaScript effectively.

How to remove a property from an object in Javascript

Łukasz Holeczek

Wednesday, August 28, 2024

#how-to #javascript

In JavaScript, working with objects is a fundamental part of building applications. Often, you may need to remove properties from an object, whether it’s for cleaning up data or preparing an object for a specific use case. This article explores various techniques for removing properties from a JavaScript object, discussing the advantages and potential pitfalls of each method. We’ll also cover how to remove multiple properties from a single object efficiently.