How to remove a class from an element in JavaScript
Removing CSS classes from elements dynamically enables state changes, interactive styling, and responsive design through JavaScript manipulation. As the creator of CoreUI, a widely used open-source UI library, I’ve implemented dynamic class removal in thousands of interactive components for modal closures, active states, and UI transitions. From my expertise, the most effective approach is using the classList.remove() method for safe and reliable class management. This method provides clean class removal without affecting other classes and handles non-existent class removal gracefully.
How to add a class to an element in JavaScript
Adding CSS classes to elements dynamically enables interactive styling, state changes, and responsive design through JavaScript manipulation. As the creator of CoreUI, a widely used open-source UI library, I’ve implemented dynamic class manipulation in countless interactive components for state management and visual feedback. From my expertise, the most effective approach is using the classList.add() method for clean and reliable class management. This method provides safe class addition without affecting existing classes and handles duplicate prevention automatically.
How to use inline styles in Vue
Inline styles in Vue enable dynamic styling that responds to component data and user interactions, perfect for values that change based on state. As the creator of CoreUI, a widely used open-source UI library, I’ve implemented inline styles in countless Vue components for dynamic theming and interactive elements. From my expertise, the most effective approach is using object syntax with computed properties for complex calculations. This method provides reactive styling that updates automatically when component data changes.
How to use conditional classes in Vue
Conditional classes in Vue enable dynamic styling that responds to component state, creating interactive interfaces where styling changes based on data and events. As the creator of CoreUI, a widely used open-source UI library, I’ve implemented conditional classes in thousands of Vue components for dynamic theming and state-based styling. From my expertise, the most effective approach is using object syntax for simple conditions and computed properties for complex logic. This method provides reactive styling that automatically updates when component state changes.
How to use Tailwind CSS with Angular
Integrating Tailwind CSS with Angular provides utility-first styling, rapid development, and consistent design systems for modern web applications. As the creator of CoreUI, a widely used open-source UI library, I’ve integrated Tailwind CSS in numerous Angular projects for rapid prototyping, theme customization, and responsive design in enterprise applications. From my expertise, the most effective approach is to install Tailwind CSS and configure it with Angular’s build system. This method provides access to Tailwind’s utility classes while maintaining Angular’s component architecture and build optimization features.
How to use Tailwind CSS in React
Implementing utility-first CSS with Tailwind in React applications provides rapid development, consistent design systems, and responsive layouts with minimal custom CSS. As the creator of CoreUI, a widely used open-source UI library, I’ve integrated Tailwind CSS in numerous React projects for rapid prototyping and consistent styling across enterprise applications. From my expertise, the most efficient approach is to install Tailwind CSS and configure it with PostCSS for optimal build integration. This method provides access to thousands of utility classes while maintaining excellent performance through automatic purging of unused styles.
How to scope CSS in Vue
Scoping CSS properly is essential for preventing style conflicts and maintaining clean component-based architecture in Vue applications.
As the creator of CoreUI, a widely used open-source UI library, I’ve implemented CSS scoping in numerous Vue components to ensure styles don’t leak between different parts of the application.
From my expertise, the most effective approach is to use the scoped
attribute in Vue’s style tags.
This method automatically generates unique identifiers for each component, ensuring styles only apply to the current component’s elements.
How to style components with CSS in React
Styling React components effectively is crucial for creating visually appealing and maintainable user interfaces in modern web applications.
As the creator of CoreUI, a widely used open-source UI library, I’ve implemented various CSS strategies across thousands of React components including buttons, forms, and complex dashboard layouts.
From my expertise, the most versatile approach is to use the className
prop with external CSS files or CSS modules.
This method provides excellent separation of concerns, easy maintenance, and seamless integration with design systems and CSS preprocessors.
How to check if an element is visible in JavaScript

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

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.