What is HTML5 – Dessign

Updated: Jun 21, 2023 By: Dessign Team

what is HTML 5

HTML5 is a markup language essential for structuring and presenting content on the World Wide Web. As the fifth and most recent major version of HTML, it is recognized as a World Wide Web Consortium (W3C) recommendation, and the current specification is referred to as the HTML Living Standard.

Offering advanced programming with the addition of numerous tags, HTML5 aims to simplify the lives of web designers and developers who create websites.

Websites typically consist of three primary types of codes: HTML, CSS, and JavaScript. HTML provides the groundwork for creating and organizing web content, while CSS and JavaScript control the presentation and behavior of a webpage, respectively.

HTML is the most basic building block of the web, defining the meaning and structure of online content. Utilizing HTML5 establishes a solid foundation for efficient web development and enhancement of user experience.

HTML5 Overview

HTML5 is a markup language used for structuring and presenting content on the World Wide Web. It is the fifth and latest major version of the HTML standard, with updated features and elements that allow developers to build more interactive and engaging websites. Developed by the World Wide Web Consortium (W3C) and the Web Hypertext Application Technology Working Group (WHATWG), the HTML5 standard has become a widely adopted platform for web development.

The <!DOCTYPE html> declaration at the beginning of an HTML document indicates that the document is written in HTML5. This declaration ensures that modern browsers interpret and render the web page correctly, taking advantage of the latest HTML features and improvements.

One significant difference between HTML5 and its previous versions is that HTML5 follows the HTML Living Standard. This means the standard is continually updated and enhanced to keep pace with the rapidly evolving web technologies and user needs. The Living Standard allows for more frequent updates, ensuring that web developers have access to the most current tools and best practices for creating fully-featured, accessible, and responsive websites.

HTML5 includes numerous enhancements and new features, such as improved support for multimedia elements, like video and audio, as well as advanced APIs for working with graphics, storage, and hardware access. These features, combined with a consistent way of structuring content using hypertext, enable developers to deliver more engaging user experiences across different devices and platforms.

In summary, HTML5 is a powerful and versatile markup language that has brought about significant improvements to the world of web development. Its ongoing Living Standard, advocated by the W3C and WHATWG, ensures that the language remains relevant, up-to-date, and capable of meeting the evolving needs of developers and users alike.

HTML5 Structure

HTML 5 structure

HTML5 is a markup language used for structuring and presenting content on the World Wide Web, and it is the fifth and final major HTML version that is a World Wide Web Consortium (W3C) recommendation source. In this section, we will look into the structure of an HTML5 document, focusing on elements, tags, doctype, title, headings, paragraphs, and semantic content.

Semantic Tags

A well-structured HTML5 document starts with the Document Type Declaration or doctype. It’s a way to inform the browser about the type of document it is and it is always the first item at the top of any HTML file source. The doctype for an HTML5 document is as follows:

<!DOCTYPE html>

The HTML element is the root element that wraps the entire page’s content. Within the HTML element, there are usually two main child elements: the head element, which contains meta-information about the document, and the body element, which contains the actual content of the page.

HTML5 introduced several semantic tags designed to improve the clarity and organization of the document structure. Semantic tags are elements that carry meaning about the structure of the page and help browsers and developers better understand the purpose of certain content. Some common HTML5 semantic tags include:

  • <header>: Represents the header or introductory content of a section.
  • <nav>: Represents a navigation section that contains links to other parts of the site or page.
  • <main>: Represents the main content of the page, excluding headers, footers, and sidebars.
  • <article>: Represents a self-contained piece of content, like a blog post or news article.
  • <section>: Represents a general section of content, usually having a relationship to nearby content.
  • <aside>: Represents secondary content, like a sidebar or related links, that is related to the main content.
  • <footer>: Represents the footer or concluding content of a section.

The title element, placed within the head element, gives the document a meaningful title that is displayed in the browser’s title bar or tab. Titles are important for SEO and user experience purposes.

Headings are used to divide the content into logical sections, making it easier to read, navigate, and understand. There are six levels of headings, from <h1> (the highest) to <h6> (the lowest).

Paragraphs are created using the <p> element, which represents a block of text, typically followed by a line break. Using appropriate paragraphs helps organize the content and improve readability.

By utilizing semantic tags, HTML5 allows developers to create more meaningful and well-structured documents, making it easier for browsers, search engines, and other machines to understand the content and its organization.


HTML5 introduced new multimedia elements to enhance web content and usability. One of the key elements is the <video> tag, which allows developers to embed video files into their web pages. This element supports various video formats, such as MP4, WebM, and Ogg. With the <video> element, developers can easily customize controls, autoplay, and loop options. For example:

<video controls>
  <source src="https://dessign.net/what-is-html5/video.mp4" type="video/mp4">
  <source src="video.webm" type="video/webm">
  Your browser does not support the video tag.


Similarly, the <audio> element in HTML5 enables developers to embed audio files into their web pages. This tag supports audio formats like MP3, WAV, and Ogg. Users can control the audio playback through customizable options, such as autoplay and loop. An example of implementing the <audio> element is:

<audio controls>
  <source src="https://dessign.net/what-is-html5/audio.mp3" type="audio/mpeg">
  <source src="audio.ogg" type="audio/ogg">
  Your browser does not support the audio element.


HTML5 also introduced the <canvas> element for creating dynamic, interactive graphics on web pages. This feature allows developers to draw and manipulate images, animations, and other graphical content using JavaScript.

Another graphics-related element, Scalable Vector Graphics (SVG), provides a way to create high-quality, responsive graphics that maintain their quality when resized or zoomed. This is particularly useful for logos, icons, and other design elements that need to adapt to various screen sizes and resolutions.

Here’s an example of an SVG element:

<svg width="100" height="100">
  <circle cx="50" cy="50" r="40" stroke="black" stroke-width="3" fill="red" />

By incorporating multimedia elements such as video, audio, and graphics, HTML5 offers enhanced capabilities to create rich, engaging, and interactive web experiences for users.

Web Browsers

HTML 5 web browsers compatibility

When it comes to HTML5, web browsers play a crucial role in interpreting and displaying content written in this markup language. All major browsers, such as Chrome, Firefox, Edge, Safari, and Opera, have implemented support for HTML5 to varying extents. This ensures that modern websites can rely on HTML5 for structure, presentation, and functionality.

One key aspect of HTML5 adoption by browsers is adhering to the HTML Living Standard. This ongoing standardization process ensures that web developers can take advantage of new features and improvements as they are adopted by browser vendors. It also helps maintain consistency in how HTML5 content is rendered across different browsers.

While there might be slight differences in how each browser implements HTML5, the overall support and rendering capabilities have reached a level that allows for a uniform browsing experience. Below is a list of five popular web browsers and their current HTML5 support:

Google Chrome: As a leading web browser, Chrome actively keeps up with the latest HTML5 specifications, providing a robust and reliable platform for web developers to create feature-rich websites.

Mozilla Firefox: Firefox, an open-source browser developed by the Mozilla Foundation, offers strong HTML5 support and continues to evolve alongside the web standards.

Microsoft Edge: As the successor to Internet Explorer, Edge has made significant strides in HTML5 compatibility, aligning itself with modern web technologies and providing a better experience for both developers and users.

Apple Safari: Safari, the default browser on Apple devices, has consistently supported and implemented HTML5 features, making it an attractive option for developers targeting the Apple ecosystem.

Opera: Opera has been an early advocate of HTML5 and continues to provide reliable support for the markup language, ensuring a seamless user experience across devices.

In conclusion, the widespread adoption of HTML5 by web browsers has paved the way for a richer and more interactive web experience. With continued development and standardization, HTML5 is set to remain at the forefront of web technologies.


HTML5 is a buzzword referring to a set of modern web technologies. It encompasses the HTML Living Standard along with various JavaScript APIs aimed at enhancing storage, multimedia, and hardware access capabilities.

One of the primary features that distinguishes HTML5 from its predecessors is its extensive support for JavaScript APIs. JavaScript APIs are constructs within programming languages that allow developers to create complex functionality with ease, as they effectively abstract more intricate code. These APIs make it possible to achieve a wide range of advanced features and interactivity on web pages.

There are numerous HTML5 APIs. Some notable examples include:

  • Geolocation API: This enables web applications to access a user’s geographical location and utilize it for various purposes, such as providing location-based services and content.
  • Web Storage API: It offers a more efficient and secure method of storing data on a user’s browser. This can improve performance and enhance user experience by preserving data even when the browser is closed.
  • Media APIs: HTML5 introduces APIs to streamline embedding and manipulation of multimedia elements, such as audio and video, into web pages.

The HTML5 specification also addresses the Document Object Model (DOM), which is a crucial aspect in enabling JavaScript to interact with web pages. Specifically, HTML5 is intended to supersede HTML 4, XHTML 1, and DOM Level 2 HTML. This provides a more consistent and standardized markup for documents, along with APIs for complex web applications.

Moreover, HTML5 focuses on interoperability and strives to improve markup options for developers. This effort helps make the web more accessible to a broader range of platforms and devices, ultimately enhancing the overall user experience.

In conclusion, HTML5 represents a significant leap forward in web technologies by incorporating a multitude of JavaScript APIs and refining web standards, such as the DOM. These advances empower developers to create more sophisticated and engaging web applications in the constantly evolving digital landscape.

HTML5 and CSS3

HTML5 is a markup language used for structuring and presenting content on the World Wide Web. It is a modern iteration of HTML, offering improved support for multimedia, storage, and hardware access features. The term HTML5 encompasses the HTML Living Standard, as well as various JavaScript APIs that enhance web functionalities.

CSS, or Cascading Style Sheets, is a complementary technology to HTML that allows web developers and designers to apply styles and layouts to HTML documents. CSS3 represents the latest version of CSS, providing new features and capabilities that enable more sophisticated and visually appealing web page designs.

One of the major advantages of using HTML5 and CSS3 together is better control over web page design. HTML is responsible for defining the structure and semantics of the content, while CSS is used to style and lay it out. With CSS3, developers can alter the font, color, size, and spacing of content, as well as create multiple columns and add visual effects, such as gradients and transitions.

HTML5 and CSS3 also enhance web accessibility and compatibility across different devices and browsers. By adhering to web standards, developers can ensure that their web pages display correctly and maintain a consistent user experience. Additionally, these modern web technologies make it easier to create responsive web designs that adapt to different screen sizes and orientations.

In conclusion, HTML5 and CSS3 play crucial roles in modern web development, providing a powerful combination for structuring and styling content on the web. By utilizing these technologies, web professionals can create dynamic, accessible, and visually stunning web pages that cater to a diverse audience and various devices.

HTML5 and Mobile Devices

HTML 5 mobile devices

HTML5 has played a significant role in the development of web applications for mobile devices. As a versatile coding language, it provides a unified and consistent structure for developers to create web applications across various platforms, including Android and Apple devices.

Mobile web applications developed using HTML5 are easily accessible and compatible with different smartphones and tablets. These apps often make use of the device’s native features, such as geolocation, GPS, camera, and accelerometer. HTML5 allows developers to build web applications that dynamically adapt to different screen sizes, making it easier to create responsive designs that work across multiple devices.

One key advantage of HTML5 is its ability to work with various software libraries and frameworks. Developers can incorporate CSS and JavaScript files from different libraries into their web applications, automatically handling many issues that arise during HTML5 app development. This flexibility ultimately benefits businesses implementing mobile apps across multiple platforms, as they can save time and resources by leveraging HTML5’s capabilities.

In addition to its adaptability, HTML5 is supported by major tech companies like Apple and Google, which means that web applications built using this language will continue to be compatible with future updates and enhancements in mobile technologies. As devices evolve, HTML5-based web applications can be easily updated to accommodate new features and improvements, ensuring seamless user experiences for mobile app users.

Furthermore, HTML5’s incorporation of new web features such as multimedia elements, offline storage, and semantic tags allows developers to create more engaging and functional mobile applications. By leveraging these capabilities, mobile web apps can be more robust and interactive, enhancing the overall user experience.

In summary, HTML5 has proven to be a valuable tool for developing web applications that cater to the needs of mobile device users. Its flexibility, compatibility, and support from major tech giants make it an ideal choice for businesses aiming to develop responsive and user-friendly mobile apps.

Comparing HTML Versions

html compare

Against HTML 4.01

HTML5 is a significant improvement over its predecessor, HTML 4.01. One of the key differences is that HTML5 has a more user-friendly and logical structure. With the introduction of new semantic elements, such as <header>, <footer>, <nav>, and <article>, HTML5 allows web developers to create more meaningful and accessible content.

In contrast, HTML 4.01 relied primarily on <div> tags, which lacked semantical indications of the content they contained. The separation of content and presentation is now more eminent since HTML5 does not require the use of presentational markup, thanks to the integration of CSS3.

Moreover, HTML5 has improved multimedia support with new elements like <video>, <audio>, and <canvas>, enhancing user experience on the web. HTML 4.01 developers needed to use third-party plugins or programming languages for such interactive content.

Against XHTML 1.0 and 2.0

HTML5 also offers advantages over XHTML 1.0 and 2.0. While XHTML aimed for a clean, well-formed XML-like syntax, it suffered from intolerance to coding errors and less flexibility, making it harder for developers to create and maintain websites.

HTML5 returns to a more forgiving, fault-tolerant approach, which simplifies its use and increases the speed of development.

Additionally, HTML5 supports backward compatibility with older HTML versions. With polyfills and fallbacks, web developers can ensure that their HTML5 content degrades gracefully for users who still use older browsers without support for HTML5 features. Such compatibility was an issue with XHTML, where the variations in syntax and parsing rules often caused compatibility problems.

Another advantage of moving from XHTML to HTML5 is the better integration with modern web technologies, particularly JavaScript. The World Wide Web has evolved since Tim Berners-Lee’s initial vision. Web browsers and applications are now more sophisticated than ever, and HTML5 enables the use of modern web APIs and features to create powerful web experiences.

In summary, HTML5 offers multiple improvements over HTML 4.01 and XHTML 1.0/2.0, including better semantics and structure, enhanced multimedia support, increased compatibility, and smooth integration with modern web technologies.

Legacy Technologies Replacements

HTML5 has emerged as a dominant force in the web development sphere, effectively replacing several older technologies. Among them are Flash, Silverlight, and Java applets for web-based applications.

Adobe Flash, once a widely-used multimedia technology to create interactive content, began to lose its stronghold with the advent of mobile devices. In 2010, Steve Jobs openly criticized Flash for its security risks, poor performance on mobile devices, and overall closed nature. This condemnation played a significant role in driving the transition towards HTML5. The scalable and adaptive features of HTML5 yielded better performance and security, eventually leading major web browsers to discontinue support for Flash.

Similarly, Microsoft’s Silverlight has seen a decline in usage, as HTML5 took the lead in offering seamless multimedia experiences. Silverlight, a plugin for delivering rich web content, also suffered from compatibility and security issues. As HTML5 became the industry standard, developers began to favor this versatile, open-source solution over Silverlight, resulting in its decreasing relevance.

Java applets, an older method of providing interactive web content, also faced difficulties as HTML5 gained popularity. Java applets were plagued by security vulnerabilities and compatibility challenges on various platforms. With HTML5, developers were given a more secure and standardized approach to creating engaging web experiences without relying on Java applets.

In conclusion, HTML5 has successfully replaced older technologies like Flash, Silverlight, and Java applets with its superior capabilities, security, and adaptability. As the web progresses, HTML5 continues to serve as the go-to solution for developing interactive and multimedia-rich content.

HTML5 Syntax

HTML5 is a markup language that provides structure to web content. Its syntax consists of various elements that combine to form the content of a webpage. These elements are defined by start and end tags, which use angle brackets < and > to enclose the shortcode.

Common elements used in HTML5 are the <p> tag for paragraphs, <h1> to <h6> for headings, and <a> for creating hyperlinks. HTML5 also has new elements, such as <header>, <footer>, <article>, and <nav>, which improve the overall page structure.

Attributes are used to provide additional information or modify the behavior of an element. Typically, an attribute consists of a name-value pair and is inserted within the start tag of an element. For example, the <a> element uses the href attribute to specify the URL of a linked resource.

HTML5 introduces tags that make it easier to design responsive web layouts. Including elements like <video>, <audio>, and <canvas>, these tags provide built-in support for multimedia and interactive content, eliminating the need for third-party plugins.

The <table> element is utilized to create tables, with <tr> representing rows and <td> for individual cells. Tables can also include <th> elements for header cells and <caption> for adding a descriptive title.

Organizing content into lists can be done using <ul> for unordered lists and <ol> for ordered lists. Each list item is wrapped within an <li> tag to represent a single point.

The class attribute allows for the easy application of styles and manipulation of elements with JavaScript. By assigning the same class to multiple elements, developers can apply consistent styling and behavior across a web page. For instance, <p class="highlight"> would apply the “highlight” style to a paragraph.

In summary, HTML5 syntax is crucial for structuring web content effectively and efficiently. With a good understanding of elements, attributes, classes, and other components, developers can create well-structured web pages that provide a great user experience.

Additional HTML5 Features

HTML5 introduced several new features, making it easier for programmers to create more complex and dynamic web pages. One of the significant updates is the addition of new semantic elements, such as <header>, <footer>, <section>, and <figure>. These elements provide a more meaningful structure to the content on web pages, offering a better user experience.

The <header> element is used to define the heading section of a web page or an article. It often contains a logo, website title, and navigation menu. Similarly, the <footer> element represents the footer section, which typically includes copyright information, contact details, and links to other important resources.

Another useful feature is the <section> element, which makes it easy to group content into distinct and semantically meaningful sections, such as chapters or summaries. This not only improves the layout of a web page but also enhances its comprehensibility.

With the <figure> element, HTML5 simplifies the task of adding images, charts, or diagrams alongside related content. This element allows the programmer to include a caption for the visual content using the <figcaption> tag, making it more accessible for screen readers and search engines.

HTML5 also supports drag-and-drop functionality, enabling users to click on an object, drag it to another location or element, and release the object. This feature significantly improves the user interface and interaction on web pages, offering a more intuitive and engaging browsing experience.

These additional features in HTML5 provide programmers with the tools they need to create rich and dynamic web content. By understanding and utilizing these new elements and functionalities, developers can enhance their web pages, offering a more enjoyable and accessible experience for users.

HTML5 and Web Development

HTML5 is the latest version of the Hypertext Markup Language, which is used for structuring and presenting content on the World Wide Web. As the fifth iteration of the language, HTML5 has introduced numerous enhancements and features, making it a powerful tool for web development HTML5 – Wikipedia. The development of HTML5 was primarily driven by the Web Hypertext Application Technology Working Group (WHATWG), an organization focused on advancing web technologies and creating unified standards for web developers.

In the realm of web development, HTML5 has made it easier to create highly interactive, engaging websites. With the addition of new elements and attributes, web developers are now able to build more accessible and efficient websites MDN Web Docs Glossary.

One of the significant improvements in HTML5 is the introduction of semantic elements. These provide a clearer indication of the content’s purpose, such as <header>, <nav>, and <footer>. Using semantic elements helps improve the overall readability of the code and can boost search engine optimization (SEO), as search engines better understand the structure of web pages.

Another notable feature of HTML5 lies in its multimedia capabilities. Standard HTML5 introduces native support for multimedia elements like audio and video, eliminating the need for third-party plugins.

Developers can now use the <audio> and <video> elements to embed media files directly into their web pages, further enhancing user experience.

HTML5 also offers powerful JavaScript APIs that extend the functionality of web applications. For example, the Geolocation API allows developers to access a user’s location data, and the Web Storage API enables storing data within the user’s browser for faster page load times and offline access. These APIs, along with many others, have made web development more efficient and versatile.

Overall, HTML5 has revolutionized the landscape of web development and paved the way for modern web applications. By incorporating new features, elements, and APIs, HTML5 has made it easier for developers to create engaging and robust websites while adhering to industry standards.