Javascript · CoreUI

Understanding and Resolving the “React Must Be in Scope When Using JSX

Tuesday, June 11, 2024

React developers often encounter the error message “React must be in scope when using JSX.” This common error can be confusing, especially for beginners. In this article, we will explore why this error occurs, how to fix it, and best practices to avoid it in the future.

What Does javascript:void(0) Mean?

Łukasz Holeczek

Tuesday, June 4, 2024

#what-is #javascript

In JavaScript, javascript:void(0) is a common expression used within hyperlinks to prevent the default behavior of the link, such as reloading the page or navigating to a new page. This expression is frequently encountered but often misunderstood by many developers. Let’s break down what it means and how it works.

How to Convert a Map to an Array in JavaScript

Łukasz Holeczek

Wednesday, May 22, 2024

#how-to #javascript

In JavaScript, the Map object is a collection of key-value pairs where each key is unique. Converting a Map to an array can be essential for data manipulation and iteration. This article explores various methods to convert a Map to an array, discussing the syntax and usage of each approach.

How to Use JavaScript setTimeout()

Łukasz Holeczek

Monday, April 29, 2024

#how-to #javascript

The setTimeout() function is a fundamental part of JavaScript that allows developers to delay the execution of code. This function is incredibly useful in creating a more interactive and dynamic user experience in web applications by scheduling tasks, managing delays, or even delaying actions within an application. In this blog post, we’ll explore how to use setTimeout() effectively, ensuring even those new to programming can grasp and implement this powerful feature.

Javascript Random - How to Generate a Random Number in JavaScript?

Łukasz Holeczek

Tuesday, April 16, 2024

#how-to #javascript

JavaScript offers various ways to generate random numbers, which are essential in many programming scenarios like gaming, simulations, and anytime you need some unpredictability in your output. In this article, we aim to introduce beginners to the simplest methods of generating random numbers in JavaScript using the Math.random() function.

How to capitalize the first letter in JavaScript?

Łukasz Holeczek

Tuesday, April 9, 2024

#how-to #javascript

In the vast landscape of web development, manipulating strings is akin to a daily ritual. Among the myriad of manipulations, capitalizing the first letter of a string stands out for its simplicity and necessity. This seemingly straightforward task can be achieved through various JavaScript techniques, each with its unique flair. But why stop at JavaScript? In the world of web styling, CSS also offers a sleek solution. This blog post explores five methods to capitalize the first letter of strings in JavaScript and dips into the CSS realm for a styling-based approach.

How to concatenate a strings in JavaScript?

Łukasz Holeczek

Thursday, April 4, 2024

#how-to #javascript

String manipulation, particularly string concatenation, is a cornerstone of JavaScript programming. This guide delves deep into the various techniques for concatenating strings, offering insights and examples to elevate your JavaScript coding skills. Whether you’re a novice or an experienced developer, understanding how to combine strings efficiently will significantly enhance your web development projects.

How to sleep in Javascript

Łukasz Holeczek

Tuesday, March 26, 2024

#how-to #javascript

In the realm of programming, sometimes there’s a need to pause the execution of code for a fixed amount of time. While many programming languages come with a built-in sleep function to handle this, JavaScript requires a slightly different approach. Let’s explore the concept of the JavaScript sleep function, including how to implement it using setTimeout, promises, and async/await syntax.

What is JavaScript Array.pop() Method?

Łukasz Holeczek

Monday, March 18, 2024

#what-is #javascript

JavaScript arrays are akin to a Swiss Army knife for developers, offering many methods to create and manipulate data efficiently. Among these tools, the pop() method is a straightforward yet powerful function that beginners should grasp early in their learning journey. This blog post will explain the pop() method, giving you the knowledge to use it effectively in your coding projects.

What is Double Question Mark in JavaScript?

Łukasz Holeczek

Tuesday, March 12, 2024

#what-is #javascript

What is Double Question Mark in JavaScript?

JavaScript is a dynamic programming language rich in features that empower developers to craft interactive and efficient web applications. Among its plethora of tools and operators, the double question mark, or as it’s formally known, the Nullish Coalescing Operator (??), stands out for its utility and simplicity. This operator, introduced in ECMAScript 2020, is a game-changer for handling variables that might need to be initialized. Let’s dive into this operator’s what, why, and how to understand its significance and application.