Learn How to Use JavaScript with CSS | Make Your Website Interactive and Stylish

In this beginner-friendly tutorial, you’ll learn how to use JavaScript with CSS to make your websites dynamic, responsive, and interactive. JavaScript can change styles, switch themes, animate elements, and respond to user events—all by modifying CSS directly from your scripts!

If you’ve ever wanted to create a dark mode toggle, animate buttons on hover, or show/hide content with a click, this is the perfect starting point.

What You’ll Learn in This Video:

How to access and modify CSS styles with JavaScript
Changing individual style properties dynamically
Adding and removing CSS classes using classList
Toggling themes or styles on button click
Using CSS transitions with JavaScript for smooth animations
Best practices for clean and maintainable code

Code Examples from the Video:

Changing an Element’s Style:

document.getElementById("myBox").style.backgroundColor = "lightblue";

Adding or Removing a Class:

document.getElementById("myBox").classList.add("active");
document.getElementById("myBox").classList.remove("active");

Toggling a Class (e.g. for Dark Mode):

document.body.classList.toggle("dark-mode");

CSS:

.dark-mode {
background-color: #121212;
color: #ffffff;
}

JavaScript:

document.getElementById("toggle").addEventListener("click", () = {
document.body.classList.toggle("dark-mode");
});

Why Use JavaScript with CSS?

* Dynamically change layouts or colors
* React to user input or screen size
* Enhance user experience with visual effects
* Create theme switchers, animations, and real-time feedback

Helpful Resources:

MDN: Manipulating CSS with JavaScript – [https://developer.mozilla.org/en-US/docs/Web/API/CSS\_Object\_Model](https://developer.mozilla.org/en-US/docs/Web/API/CSS_Object_Model)
JavaScript classList Reference – [https://developer.mozilla.org/en-US/docs/Web/API/Element/classList](https://developer.mozilla.org/en-US/docs/Web/API/Element/classList)
CSS Transitions Guide – [https://css-tricks.com/almanac/properties/t/transition/](https://css-tricks.com/almanac/properties/t/transition/)

Like, Comment & Subscribe for More Front-End Tutorials!

If this video helped you understand how JavaScript works with CSS, give it a Like, leave your questions in the Comments, and Subscribe for more tutorials on HTML, CSS, JavaScript, and web development.

Build interactive and beautiful websites—start combining your JavaScript and CSS skills today!

\#JavaScriptWithCSS #DynamicStyling #JavaScriptCSS #WebDevelopment #LearnJavaScript #CSSAnimation #DarkModeToggle #FrontEndDevelopment #JavaScriptTutorial #CSSTips #JavaScriptBeginners #DOMManipulation #WebDesign #JSStyling #ClassListJavaScript

Would you like a follow-up video on advanced animations with JavaScript or using CSS variables in JS? Let us know in the comments below!