How To Use CSS3 Or HTML5

By Asad Nadeem

CSS3 and HTML5 are essential tools for creating dynamic and responsive web pages. HTML5 provides the structure and content of a webpage, while CSS3 provides the styling and visual effects. In this article, we will cover the basics of using CSS3 and HTML5 to create a simple webpage.

HTML5 Basics:

HTML5 is the latest version of HTML, and it offers many new features and improvements over previous versions. Here is an example of a basic HTML5 document:

<!DOCTYPE html>
<html>
<head>
	<title>My Webpage</title>
</head>
<body>
	<h1>Welcome to my webpage</h1>
	<p>This is my first paragraph.</p>
	<p>This is my second paragraph.</p>
</body>
</html>

The above code creates a basic webpage with a title, a heading, and two paragraphs.

CSS3 Basics:

CSS3 is the latest version of CSS, and it offers many new features and improvements over previous versions. Here is an example of how to use CSS3 to style the above HTML document:

<!DOCTYPE html>
<html>
<head>
	<title>My Webpage</title>
	<style>
		body {
			background-color: #f1f1f1;
			font-family: Arial, sans-serif;
		}
		h1 {
			color: #333;
			text-align: center;
			font-size: 3rem;
			margin-top: 50px;
		}
		p {
			font-size: 1.2rem;
			line-height: 1.5;
			margin: 20px;
			text-align: justify;
		}
	</style>
</head>
<body>
	<h1>Welcome to my webpage</h1>
	<p>This is my first paragraph.</p>
	<p>This is my second paragraph.</p>
</body>
</html>

The above code uses CSS3 to add background color, font style, text color, and spacing to the HTML document.

Advanced CSS3 and HTML5 Features:

Here are some advanced features of CSS3 and HTML5 that you can use to create more complex and sophisticated web pages:

Flexbox Layout:

CSS3 offers a flexible box layout system that makes it easier to create responsive and dynamic layouts. With flexbox, you can easily align and position elements within a container, and adjust their size and order based on screen size and device orientation.

Here’s an example of using flexbox to create a responsive navigation bar:

<nav class="nav-bar">
	<ul>
		<li><a href="#">Home</a></li>
		<li><a href="#">About</a></li>
		<li><a href="#">Services</a></li>
		<li><a href="#">Contact</a></li>
	</ul>
</nav>

<style>
	.nav-bar {
		display: flex;
		justify-content: space-between;
		align-items: center;
		background-color: #333;
		padding: 10px;
	}

	.nav-bar ul {
		display: flex;
		flex-direction: row;
		margin: 0;
		padding: 0;
		list-style: none;
	}

	.nav-bar ul li {
		margin: 0 10px;
	}

	.nav-bar ul li a {
		color: #fff;
		text-decoration: none;
		font-weight: bold;
	}
</style>

Responsive Images:

HTML5 offers several features for optimizing images for different screen sizes and devices. You can use the ‘srcset‘ and ‘sizes‘ attributes to provide multiple versions of an image for different screen resolutions, and use the ‘picture‘ element to provide alternative image sources based on screen size.

Here’s an example of using responsive images in HTML5:

<picture>
	<source srcset="image-large.jpg" media="(min-width: 768px)">
	<source srcset="image-medium.jpg" media="(min-width: 480px)">
	<source srcset="image-small.jpg" media="(max-width: 479px)">
	<img src="image-default.jpg" alt="A beautiful landscape">
</picture>

CSS Animations:

CSS3 offers several animation features that allow you to create dynamic and interactive effects on your web pages. You can use the 'animation' property to create custom animations for elements on your page, and the 'keyframes' rule to define the animation’s sequence of events.

Here’s an example of using CSS animations:

<div class="box"></div>

<style>
	.box {
		width: 100px;
		height: 100px;
		background-color: #333;
		animation: myanimation 2s ease-in-out infinite;
	}

	@keyframes myanimation {
		0% { transform: scale(1); }
		50% { transform: scale(1.5); }
		100% { transform: scale(1); }
	}
</style>

Conclusion:

CSS3 and HTML5 are powerful tools for creating dynamic and responsive web pages. By learning the basics of HTML5 and CSS3, you can create web pages that are both visually appealing and functional. With practice and experimentation, you can master these languages and create complex and impressive web pages.