Blog · CoreUI

How to force a React component to re-render

Monday, September 9, 2024

#how-to #react

React triggers re-rendering when there’s a change in state or props. However, there are scenarios where you might need to force a component to re-render manually without explicitly modifying its state. This article will explore ways to force re-renders in both class and functional components to ensure the UI reflects the latest data.

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.

The Wacky World of JavaScript: Unraveling the Oddities

Łukasz Holeczek

Tuesday, August 20, 2024

#how-to #javascript

JavaScript, the ubiquitous language of the web, is known for its flexibility and, at times, its perplexing behavior. Let’s dive into some of the more peculiar aspects of JavaScript that can leave both novice and experienced developers scratching their heads.

How to check if an element is visible in JavaScript

Łukasz Holeczek

Friday, August 16, 2024

#how-to #css

In JavaScript, determining if a DOM element is visible is crucial for tasks like lazy-loading images, triggering animations, and enhancing accessibility. This article covers two main contexts for checking visibility: general visibility (whether the element is rendered and visible based on CSS properties) and viewport visibility (whether the element is visible within the user’s current view). We’ll also delve into the checkVisibility() method, including its options and limitations, and its browser support. Additionally, we’ll discuss how these techniques are applied in real-world components, such as carousels in popular UI frameworks.

How to change opacity on hover in CSS

Łukasz Holeczek

Monday, August 12, 2024

#how-to #css

Changing the opacity of images on hover is a common effect used in web design to create dynamic and interactive user interfaces. This article will walk you through the process of using the opacity property in CSS to achieve this effect.

How to dynamically add, remove, and toggle CSS classes in React.js

Łukasz Holeczek

Friday, August 9, 2024

#how-to #css #react

how to add remove toggler css class dynamically in react

Managing CSS classes dynamically in a React application is a common requirement, especially when it comes to creating interactive components. This article will guide you through various techniques to add, remove, and toggle CSS classes in React.

How to loop through a 2D array in JavaScript

Łukasz Holeczek

Saturday, August 3, 2024

#how-to #javascript

javascript how to loop through a 2 dimensional array

In JavaScript, a two-dimensional (2D) array is an array of arrays. It’s often used to store data in a tabular form. Traversing these arrays efficiently is crucial for many software development tasks. This article covers various methods to loop through a 2D array in JavaScript, offering examples to demonstrate each technique.

How to limit items in a .map loop in JavaScript

Łukasz Holeczek

Tuesday, July 30, 2024

#how-to #javascript

When working with arrays in JavaScript, the .map method is a powerful tool for transforming elements. However, there are scenarios where you need to limit the number of items processed by .map. This can be particularly useful when handling large datasets or when you only need a subset of data for performance reasons. Here, we’ll explore different methods to limit items in a .map loop.