Short Answer
Dynamic HTML, or DHTML, is a mix of web technologies that makes websites interactive. It uses HTML, CSS, and JavaScript together. When you click or move your mouse on a webpage, and things change without loading a new page, that’s DHTML at work.
For example, when you hover over a menu and it drops down, that’s DHTML. JavaScript tells the webpage to change the style of the menu, making it visible. This happens right away, without waiting for the server.
Detailed Answer
Dynamic HTML, or DHTML, is not a programming language but a term that describes the combination of HTML, CSS, and JavaScript to create interactive and animated websites. It allows web pages to change their appearance and content in response to user actions without needing to reload.
How DHTML works with JavaScript?
- HTML: This is the structure of the web page. It’s like the skeleton of a body.
- CSS: This adds style to the HTML. It’s like the clothes on the skeleton.
- JavaScript: This makes the page do things. It’s like the muscles that move the skeleton.
When you use DHTML, JavaScript plays a key role. It can change the HTML and CSS on the page. This means that the page can react to what you do, like clicking or moving your mouse.
Examples
- Menus: When you hover over a menu item, JavaScript can change the CSS to show a dropdown menu.
- Forms: As you fill out a form, JavaScript can check your answers and tell you if there’s a mistake.
- Animations: JavaScript can move things around on the page, like sliding images or fading in text.
Here’s a simple example demonstrating DHTML in action. This example will show how you can use JavaScript to dynamically change the content and style of an HTML element when a user clicks a button.
HTML
<!DOCTYPE html>
<html>
<head>
<title>DHTML Example</title>
</head>
<body>
<h1 id="header">Hello, World!</h1>
<button id="changeButton">Change Content and Style</button>
<script src="script.js"></script>
</body>
</html>
CSS (inline for simplicity, but it’s usually in a separate file):
<style>
.changed {
color: red;
font-weight: bold;
font-size: 24px;
}
</style>
JavaScript (script.js):
document.addEventListener('DOMContentLoaded', function() {
document.getElementById('changeButton').addEventListener('click', function() {
var header = document.getElementById('header');
// Change the content of the header
header.textContent = 'Welcome to DHTML!';
// Dynamically change the style using CSS class
header.className = 'changed';
});
});
In this example:
- The HTML part consists of a header (
<h1>
) element and a button. The header displays a simple message, and the button is intended to trigger the dynamic change. - The CSS defines a class
.changed
that changes the text color to red, makes it bold, and increases its font size. This demonstrates how CSS is used to define the styles that JavaScript will apply dynamically. - The JavaScript waits for the DOM content to be fully loaded and then adds an event listener to the button. When the button is clicked, the JavaScript code changes the text content of the header and applies the CSS class
changed
to it, which alters its appearance.
This simple example encapsulates the essence of DHTML by using JavaScript to dynamically modify both the content (HTML) and presentation (CSS) of the webpage in response to user actions, without requiring a page reload. It’s a fundamental technique for enhancing the interactivity and responsiveness of web pages.
Important points about DHTML
- Interactive: DHTML makes web pages respond to user actions.
- Live Changes: With DHTML, changes happen as soon as you do something, like clicking.
- No Page Reloads: You don’t have to wait for a new page to load to see changes.
In conclusion, DHTML makes websites fun and interactive. It uses HTML for structure, CSS for style, and JavaScript for action. Together, they make web pages that can change and respond right away. This makes your experience on the web smoother and more enjoyable.
Similar Reads
-
What is COM and DCOM?
Short Answer 1. COM (Component Object Model) COM is like a rule book for how pieces of computer programs can… -
How is Java Strongly Associated with Internet?
Short Answer Java is like a superhero of the internet world. When it first appeared, Java brought new powers to… -
Differences between Java and JavaScript
Java and JavaScript are two distinct programming languages that serve different purposes and have different capabilities. Despite the similarity in… -
What is CORBA in details
Short Answer CORBA stands for Common Object Request Broker Architecture. It's a way for different computer programs to talk to… -
Importance of COM/DCOM in making Commercial Website
Short Answer Imagine you want to build a super cool clubhouse, but instead of starting from scratch, you use parts… -
Difference between COM and DCOM
Short Answer COM (Component Object Model) and DCOM (Distributed Component Object Model) are both technologies from Microsoft. COM lets different… -
Difference between Dynamic web page, Static Web page and Active web Pages
Short Answer Static web pages are like pictures in a book. They look the same every time you see them.… -
A detailed note on Servlet Package
Short Answer The servlet package is a part of Java that helps you make web pages that can change based… -
Servlet and life cycle of Servlet
Short Answer A servlet is a Java program that runs on a web server. It helps websites interact with users… -
What is Struts framework? Write its features and advantage
Short Answer Struts is a framework for building web applications in Java. It helps developers create websites that can easily…