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HTML5 is the fifth version of Hypertext Markup Language (HTML)a standard language used to structure webpages. It defines how content on a webpage should be structured and displayed. Here are some key points of HTML5.

Provides multimedia support by embedding audio and video without plugins.
Adds new form controls like date and email input types.
Enables web storage to store data offline for better performance.
Uses semantic elements such as <header> and <footer> for clearer structure.
Delivers improved performanceespecially on mobile devices.

HTML

<html>
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-widthinitial-scale=1.0">
    <title>Simple HTML Page</title>

</head>
<body>

    <header>
        <h1>HelloWorld!</h1>
    </header>

    <main>
        <p>This is a simple HTML5 page.</p>
    </main>

    <footer>
        <p>@GeeksforGeeksSanchhaya Education Private LimitedAll rights reserved</p>
    </footer>

</body>
</html>

It defines a simple HTML5 page with DOCTYPE<html><head>and <body> tags.
Includes a character set (UTF-8) and viewport settings for mobile responsiveness.
Contains a headermain contentand footer with basic text content.

New Added Elements in HTML 5

HTML5 introduced several new elements that help structure a webpage better and make it more interactive. These elements not only improve the design but also make the code more readable and accessible. Here are some key elements of HTML5:

<article>: The <article> tag represents independentself-contained content like articles or posts.
<aside>: The <aside> tag holds secondary or related information supporting the main content.
<figcaption>: The <figcaption> tag provides a caption or description for a <figure> element.
<figure>: The <figure> tag groups self-contained media such as imagesdiagramsor code.
<header>: The <header> tag contains introductory content like headings or navigation links.
<footer>: The <footer> tag includes closing content such as author info or copyright notes.
<main>: The <main> tag defines the centralmost important content of the webpage.
<mark>: The <mark> tag highlights or emphasizes specific text.
<nav>: The <nav> tag groups navigation links for moving around the site.
<section>: The <section> tag organizes related content into thematic blocks.
<details>: The <details> tag creates expandable or collapsible content sections.
<summary>: The <summary> tag provides the clickable heading for a <details> element.
<time>: The <time> tag represents dates or times in a readable and machine-usable format.
<bdi>: The <bdi> tag isolates text with unknown or mixed text direction.
<wbr>: The <wbr> tag adds an optional line-break position in long words.
<datalist>: The <datalist> tag provides autocomplete suggestions for an <input> element.
<keygen>: The <keygen> tag generates key pairs for secure authentication (deprecated).
<output>: The <output> tag displays results of calculations or script actions.
<progress>: The <progress> tag visually represents the progress of a task.
<svg>: The <svg> tag embeds scalable vector graphics into a webpage.
<canvas>: The <canvas> tag draws dynamic graphics using JavaScript.
<audio>: The <audio> tag embeds audio content like music or sound effects.
<embed>: The <embed> tag inserts external resources such as media players or apps.
<source>: The <source> tag defines media sources for <audio> and <video> elements.
<track>:The <track> tag provides captions or subtitles for videos.
<video>: The <video> tag embeds video content directly into a webpage.

Deprecated Elements in HTML5

HTML5 has removed several outdated elementsreplacing them with newermore flexible solutions:

The <acronym> tag is removed; use <abbr>.
The <applet> tag is outdated; use <object>.
The <basefont> tag is removed; use CSS for font styling.
The <big> tag is removed; use CSS font-size.
The <center> tag is not supported; use CSS text-align.
The <dir> tag is removed; use <ul>.
The <font> tag is removed; use CSS for all text styling.
The <frame><frameset>and <noframes> tags are removed with no replacements.
The <isindex> tag is removed and no longer needed.
The <strike> tag is removed; use CSS<s>or <del>.
The <tt> tag is removed; use CSS or <code> for monospace text.

HTML5 Advantages

HTML5 offers several benefits that enhance modern web development like:

Works on all major browsers and devices (cross-platform).
Lets websites access user location (geolocation).
Supports offline use through Web Storage or AppCache.
Uses semantic tags for cleanersimpler code.
Optimized for smooth performance on mobile devices.

HTML5 Disadvantages

Despite its strengthsHTML5 comes with some drawbacks:

Older browsers may not support all HTML5 features (browser inconsistencies).
Some older mobile devices struggle with HTML5 (mobile compatibility issues).
Web Storage and similar features can pose security risks if misused.
Advanced APIs introduce complexity for beginners.
IE 8 and below show poor support for HTML5.

Example of HTML5

Here are demonstration of some HTM5 elements:

Adding a Video Using the <video> Tag

HTML

<html>
<body>
    <video width="320" height="100" controls>
        <source src="movie.mp4" type="video/mp4">
        Your browser does not support the video tag.
    </video>
</body>
</html>

The <video> tag is used to embed a video in the HTML page.
The controls attribute adds playpauseand volume control buttons.
The <source> tag specifies the video file and format. If the video is not supportedthe text inside the <video> tag will be displayed.

Using the <canvas> Element for Drawing

HTML

<html>
<body>
    <canvas id="myCanvas" width="100" height="100"></canvas>
    <script>
        var canvas = document.getElementById("myCanvas");
        var ctx = canvas.getContext("2d");
        ctx.fillStyle = "blue";
        ctx.fillRect(50, 50, 100, 100);
    </script>
</body>
</html>

The <canvas> tag is used to create an area for drawing graphics using JavaScript.
The getContext(“2d”) method is used to set up a 2D drawing context on the canvas.
The fillRect method draws a blue rectangle within the canvas.

Using the <progress> Element to Show Task Progress

HTML

<html>
<body>
    <h1>HTML5 Progress Bar Example</h1>
    <progress value="70" max="100"></progress>
</body>
</html>

The <progress> tag is used to display a progress bar on the webpage.
The value attribute sets the current progressand the max attribute defines the maximum value.

Best Practices of Using HTML5

Use Semantic Tags: Improve SEO and accessibility by using tags like <header><footer><article>and <section>.
Ensure Cross-Browser Compatibility: Test your code across multiple browsersespecially older versions.
Use <meta charset=”UTF-8″>: Always specify the character encoding at the start to avoid encoding issues.
Mobile Responsiveness: Use the <meta name=”viewport” content=”width=device-widthinitial-scale=1.0″> tag for mobile-friendly designs.

HTML5 Introduction

New Added Elements in HTML 5

Deprecated Elements in HTML5

HTML5 Advantages

HTML5 Disadvantages

Example of HTML5

Adding a Video Using the <video> Tag

Using the <canvas> Element for Drawing

Using the <progress> Element to Show Task Progress

Best Practices of Using HTML5

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