Introduction
HTML, or Hypertext Markup Language, is the primary language for structuring web pages. It collaborates with CSS and JavaScript to define content, appearance, and behavior. HTML comprises elements enclosed in angle brackets, encompassing various webpage components like headings, paragraphs, images, and links. The standard structure includes the , , and elements. HTML facilitates hyperlink creation through the tag, enabling seamless navigation between web pages. HTML5, the latest version, introduces new elements and attributes, enhancing web functionality and accessibility. In essence, HTML serves as the foundation for creating structured, interactive web content, essential for web development and design.

New features in HTML5
About Lesson

HTML5 introduced several new features and enhancements to the HTML language, improving its capabilities for building modern web applications. Here are some of the key new features in HTML5:

1. **Semantic Elements:**
– HTML5 introduced semantic elements such as `<header>`, `<nav>`, `<main>`, `<section>`, `<article>`, `<aside>`, and `<footer>`.
– These elements provide clearer structure and meaning to web documents, improving accessibility and SEO.

2. **New Input Types:**
– HTML5 introduced new input types, including `email`, `url`, `tel`, `number`, `date`, `time`, `color`, and `range`.
– These input types provide better support for user input validation and allow browsers to provide native input controls and validation.

3. **Form Enhancements:**
– HTML5 introduced several form enhancements, such as the `placeholder` attribute, which provides placeholder text for input fields.
– Other form features include the `autocomplete` attribute for controlling autofill behavior, and the `required` attribute for specifying required fields.

4. **Audio and Video Support:**
– HTML5 introduced native support for embedding audio and video content directly into web pages using the `<audio>` and `<video>` elements.
– These elements allow developers to include media content without relying on third-party plugins like Flash.

5. **Canvas and SVG Graphics:**
– HTML5 introduced the `<canvas>` element, which provides a drawing surface for creating dynamic graphics and animations using JavaScript.
– Additionally, HTML5 includes native support for Scalable Vector Graphics (SVG), allowing developers to create resolution-independent graphics directly in HTML.

6. **Local Storage:**
– HTML5 introduced the `localStorage` and `sessionStorage` APIs, allowing web applications to store data locally in the user’s browser.
– This enables offline access, improved performance, and persistence of user data between sessions without relying on cookies.

7. **Geolocation API:**
– HTML5 introduced the Geolocation API, which allows web applications to access the user’s geographical location.
– This enables location-aware features such as mapping, local search, and location-based services.

8. **Web Workers:**
– HTML5 introduced the Web Workers API, which enables multi-threaded JavaScript execution in web applications.
– Web Workers allow long-running scripts to run in the background without blocking the main execution thread, improving responsiveness and performance.

9. **WebSockets:**
– HTML5 introduced the WebSocket API, which enables real-time, bidirectional communication between web clients and servers.
– WebSockets allow for efficient, low-latency communication, making them ideal for applications requiring real-time updates, such as chat applications and online gaming.

10. **Responsive Images:**
– HTML5 introduced support for responsive images through the `srcset` and `sizes` attributes, allowing developers to provide different image sources based on device characteristics such as screen size and resolution.
– This helps optimize image delivery and improve page load times on devices with varying capabilities.

These are just some of the key features introduced in HTML5, which have significantly expanded the capabilities of web development and enabled the creation of more interactive, dynamic, and feature-rich web applications.

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