How to use javascript in css?

Introduction

Using JavaScript in CSS allows developers to add dynamic behavior and interactivity to their web pages. By combining the power of these two languages, developers can create engaging user experiences and enhance the functionality of their websites. In this article, we will explore how to use JavaScript in CSS and discuss various techniques and examples.

Manipulating CSS Properties with JavaScript

One of the ways to use JavaScript in CSS is by manipulating CSS properties dynamically. This can be achieved by accessing the DOM (Document Object Model) elements and modifying their style properties using JavaScript. For example, you can change the background color of an element when a button is clicked or apply animations to elements based on certain conditions.

Example: Changing the background color of an element using JavaScript in CSS:

“`html

Change Color

“`

In the above example, when the “Change Color” button is clicked, the JavaScript function `changeColor()` is called. This function accesses the element with the id “myElement” and modifies its `backgroundColor` style property to “blue”, changing the background color of the element.

Using JavaScript Variables in CSS

Another way to use JavaScript in CSS is by using JavaScript variables to dynamically set CSS property values. This can be useful when you want to apply different styles to elements based on certain conditions or user interactions.

Example: Using JavaScript variables in CSS:

“`html

Change Styles

“`

In this example, the CSS properties `width`, `height`, and `background-color` of the element with the id “myElement” are set using CSS variables. These variables are then dynamically modified using JavaScript when the “Change Styles” button is clicked, resulting in the element’s styles being updated accordingly.

Conclusion

Using JavaScript in CSS opens up a wide range of possibilities for creating dynamic and interactive web pages. By manipulating CSS properties with JavaScript and using JavaScript variables in CSS, developers can achieve custom styling and dynamic behavior that enhances the user experience. Experimenting with these techniques can lead to innovative and engaging web designs.

References

– developer.mozilla.org
– www.w3schools.com
– css-tricks.com