HTML5

Computers use special rules for the web.

These rules help show pictures and videos. They help make the web work well. One set of rules is called HTML5.

HTML5 helps computers show movies and sounds.

It makes it easy to see things on a screen. This works on phones and tablets too.

These rules help make web pages look right. They help computers and people understand the same thing. This makes the web a great place to visit.

Computers use special rules to build web pages. One important set of rules is called HTML5.

HTML5 helps show text, pictures, and videos. It was made to work well on many devices. This includes phones and tablets.

HTML5 added new ways to show media. It uses special parts to play sound and movies. It also uses math formulas and drawings.

These parts help make web apps more complex. The rules also help make pages easy to read. This is good for both people and computers.

Two groups worked on these rules. One group is the W3C. The other group is the WHATWG. They had different ideas for a long time. The W3C liked to make fixed versions. The WHATWG made a "living standard." This means the rules are always being updated. Now, the WHATWG rules are the main ones to use. This helps keep the web working for everyone.

HTML5 is a special language used to build the web. It is a markup language that helps structure and present documents on the World Wide Web.

This language tells a web browser how to show text and images. It was designed to be easy for people to read. It also makes sure computers and devices can understand it too. HTML5 was a major step forward for the internet. It helped make web pages much more useful for everyone.

This language works by using many different parts to handle media. It includes new ways to show video and sound without extra tools.

It uses special elements like `<video>` and `<audio>` to play movies and music. It also added support for math formulas and drawings called SVG. New parts like `<section>` and `<article>` help organize the structure of a page. These tools allow web apps to become very complex and interactive. This makes the web feel more like a collection of helpful apps.

Groups of experts worked hard to create these rules. The Web Hypertext Application Technology Working Group, or WHATWG, started in 2004. This group includes people from Apple, Google, Mozilla, and Microsoft. They wanted to make sure new technology worked with older software. This is called being backward-compatible. Ian Hickson from Google and David Hyatt from Apple helped write early drafts. The first public version came out on 22 January 2008. Later, in October 2014, it became an official recommendation.

There was a big debate about how the web should work. For a long time, two groups had different ideas. The W3C group liked to release fixed versions like HTML 5.1 or 5.2. The WHATWG group preferred a "living standard." A living standard is never truly finished because it is always being updated. In 2019, the two groups agreed to work together. Now, the HTML Living Standard is the main set of rules to follow. This helps keep the web working the same way for everyone.

HTML5 changed how we use our devices every day. In the past, people often used a tool called Adobe Flash for videos. A famous letter from Steve Jobs in 2010 said Flash was no longer needed. He believed that new standards like HTML5 would win the mobile era. Eventually, Adobe stopped making Flash for mobile devices in 2011. By the end of 2020, they stopped supporting it entirely. Because of HTML5, we can now watch videos on phones and tablets easily. It made the mobile internet possible for all of us.

HTML5, or Hypertext Markup Language 5, is a specialized markup language. It is used to structure and present hypertext documents across the World Wide Web.

This language provides the essential framework that allows web browsers to display content correctly. It serves as a foundation for both simple text pages and highly complex web applications. By defining how information is organized, HTML5 ensures that websites are accessible to both humans and various digital devices. This includes everything from desktop computers to low-powered mobile devices.

The mechanism of HTML5 relies on a variety of new elements and application programming interfaces, often called APIs. To handle multimedia, it introduced specific tags like `<video>` and `<audio>` for native playback. It also added support for Scalable Vector Graphics, or SVG, and MathML for mathematical formulas. To improve page organization, it introduced semantic elements like `<article>`, `<section>`, `<nav>`, and `<aside>`. These tags give meaning to the structure of a page. Instead of just being boxes, these elements tell the browser exactly what each part of the content represents.

This clarity helps browsers and parsers understand the document more consistently.

HTML5 was designed to be a massive improvement over its predecessors. It was intended to subsume HTML 4, XHTML1, and even the DOM Level 2 HTML. One of its primary goals was to remain backward-compatible. This means that new HTML5 code can still work alongside older software. It also aimed to avoid the extreme rigidity found in XHTML. By providing detailed processing models, HTML5 encourages interoperability. This means different web browsers can implement the language in ways that produce similar, predictable results for every user.

The history of HTML5 began with a period of intense development and competition. In 2004, the HTML 4.01 standard had not been updated for four years. At that time, the World Wide Web Consortium (W3C) was focusing on XHTML 2.0. However, a group including Mozilla and Opera released a position paper in June 2004. They argued for technologies that remained backward-compatible with existing browsers. After a workshop vote, the Web Hypertext Application Technology Working Group (WHATWG) was formed. This consortium included major vendors like Apple, Google, Mozilla, and Microsoft. Ian Hickson from Google and David Hyatt from Apple produced the first public working draft on 22 January 2008.

A significant moment in web history involved the transition away from Adobe Flash. While both HTML5 and Flash can play audio and video, they function very differently. HTML5 requires CSS3 or JavaScript to handle animation and interactivity. In April 2010, Apple CEO Steve Jobs wrote a famous letter titled "Thoughts on Flash." He argued that Flash was no longer necessary for web content. He believed that new open standards, such as HTML5, would succeed in the mobile era. This debate influenced the industry significantly. In November 2011, Adobe announced it would stop developing Flash for mobile devices. Eventually, Adobe officially discontinued Flash on 31 December 2020.

For several years, there was a philosophical divide between the W3C and the WHATWG. The W3C preferred a "snapshot" approach. This meant they released specific, static versions like HTML 5.1 or HTML 5.2. In contrast, the WHATWG promoted a "living standard." A living standard is never truly finished; it is constantly being updated with new features. This split created a "fragile" relationship characterized by "squabbling" over technical details. For example, the two groups sometimes disagreed on how certain elements should be defined. However, on 28 May 2019, the W3C ceded authority over HTML and the DOM to the WHATWG. This move resolved the conflict, making the HTML Living Standard the single authoritative version.

Today, HTML5's legacy lives on through the HTML Living Standard. The W3C retired the formal HTML5 recommendation on 27 March 2018. They also retired older versions like HTML 4.0 and XHTML 1.1. The transition to a living standard ensures that the web can evolve without the need for constant, massive version changes. This system allows for the continuous addition of new features while ensuring that existing functionality is not removed. It connects the entire ecosystem of web development into one moving, growing system.