The difference between html5 and html

With the continuous development of Web technology, more and more developers are paying attention to the difference between HTML5 and HTML. HTML5 is a new version of HTML (Hypertext Markup Language) with many improvements and new features. In this article, we’ll dive into the differences between HTML5 and HTML.

First, HTML5 is different from HTML in markup. In HTML5, markup becomes clearer and more semantic. Unlike HTML, HTML5 supports new markup elements, such as:

,

,

,

,

. These tags provide better structured semantics, making web pages Content is more expressive and clear. HTML5 also adds some new attributes, such as "contenteditable", "placeholder", "required", "autofocus", etc. These attributes make it easier for developers to add interactivity and form validation to pages.

Second, HTML5 uses Canvas to create graphics and animations. In contrast, HTML can only implement graphics and animation using asynchronous JavaScript and the DOM (Document Object Model), which is slow and doesn't work well when dealing with complex images. Canvas is a new element that allows developers to draw 2D graphics and animations on web pages with high efficiency and can provide developers with more creative inspiration.

Third, HTML5 enhances the performance and real-time nature of web applications by using Web Workers and WebSockets. Web Workers allow developers to use multiple threads to process JavaScript to improve page responsiveness and performance. WebSocket is a new protocol that allows a persistent connection between the browser and the server to achieve faster and more real-time interaction.

Fourth, HTML5 has better compatibility and has also been improved in processing video, audio, animation, etc. In HTML5, video and audio can be embedded directly on web pages without having to rely on third-party plug-ins such as Flash. This greatly improves the accessibility of web pages and gives developers greater control over the media playback experience.

Fifth, HTML5 also improves form and input processing. HTML5 adds some new form elements and attributes, supports real-time input validation, and provides auto-fill and auto-complete functions, allowing developers to better control input and form processing.

In short, HTML5 has better compatibility and more new features than HTML, and can better meet the needs of modern web development. With the continuous development of Web technology, HTML5 will become the mainstream standard in the future.

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