With Style

Today’s posting will be short and sweet. I want to touch on Cascading Style Sheets (CSS). Plainly stated, CSS gives HTML their look and feel. Without CSS, HTML would be plain and boring. CSS is one of the legs of the three legged stool of the web. The other two legs would be HTML and ¬†JavaScript. Web developers need to know how to work with all three. For today’s post, I simply want to address how we can programmatically touch CSS stylings with JavaScript through the DOM.

The DOM exposes CSS style classes with the class name property (className). So we can use this property to change the look and feel of our web application. Here is an example…

[code lang=”html”]
<style type="text/css">
/* CSS stylings to demo className */
.firstClass{
color: red;
}
.secondClass{
color: blue;
}
</style>
<!– Div to hold content for className demo. –>
<div id="myDiv" class="firstClass">This is my div text.</div>
<!– Button to trigger onclick event to change class name. –>
<button id="myButton">Change Text Color</button>
<script>
// btn variable to grab the button
var btn = document.getElementById("myButton");
// onclick event to change the class name of the div
btn.onclick = function(){
document.getElementById("myDiv").className = "secondClass";
};
</script>
[/code]

If you try out the above code, you can click the button and the text will change from red to blue. As you can see, the className property is very useful. We can grab a piece of HTML content and change the stylings on the fly.

Happy Coding!

Clay Hess

More To Explore

computer, laptop, work place-2982270.jpg
Code

Unlocking Wireless Communication: A Dive into the Bluetooth API

Wireless communication has become an integral part of our daily lives, and Bluetooth technology is at the forefront of this revolution, enabling devices to exchange data over short distances and creating a world more interconnected than ever before. At the heart of this technology lies the Bluetooth Application Programming Interface (API), a powerful tool for developers looking to harness the capabilities of Bluetooth in their applications. In this blog post, we’ll explore what the Bluetooth API is, how it works, and the possibilities it opens up for innovation in wireless communication.

lighthouse, beacon, atlantic-8578318.jpg
Code

Understanding the Beacon API: Simplifying Asynchronous Data Transfers

In today’s data-driven world, web applications often need to send data back to the server. Traditionally, this has been done using AJAX requests or similar methods. However, these techniques can come with a cost, especially when dealing with data that needs to be sent during the unload phase of a document, such as tracking and diagnostic data. This is where the Beacon API shines by allowing developers to send data to a server more reliably and efficiently.

Share This Post

small_c_popup.png

Need help?

Let's have a chat...


Login

Jump Back In!

Here at Webolution Designs, we love to learn. This includes sharing things we have learned with you. 

Register

Begin Your Learning Journey Today!

Come back inside to continue your learning journey.