The difference of html5

The difference of HTML5

With the rapid development of the Internet, HTML has become the basis for web development, and HTML5 is the latest version of HTML. Compared with HTML4, HTML5 not only provides richer and more advanced functions, but also enhances accessibility, reliability and scalability. Today we will explore the differences between HTML5 and HTML4.

1. Semantic markup

Compared with HTML4, HTML5 focuses on semantic markup. The so-called semantic markup refers to describing page content through HTML5 tags and attributes, making the page easier to read and understand by search engines. HTML5 introduces many new tags and attributes, such as

and

tags, which divide content into clearer parts. This not only makes the website structure clearer, but also improves search engine optimization (SEO). Effect.

2. Multimedia support

HTML5 has very comprehensive support for multimedia. For example, it can play audio and video directly without third-party plug-ins. The browser can support image formats through the standard HTML5 tag, and also supports a tag called Canvas, which allows you to draw 2D graphics and animations on the web page. With these features, HTML5 makes the performance of multimedia content on web pages more extensive and rich.

3. New form elements

HTML5 introduces some new form elements, such as and , making the form more readable and easier to use. Among them, the date attribute allows the user to select a date, and the search attribute allows the user to search for content and automatically complete it when the user enters the content. These form elements make creating forms easier and interacting with users more natural.

4. Enhanced accessibility

HTML5’s semantic markup and multimedia support can improve website accessibility. For example, it uses

and

tags to describe the head and footer of the page so that screen readers and search engines can easily identify the main content of the page. The CSS3 border-radius property can also make website elements more accessible, as it can help eliminate excessive shadows and borders, thereby improving readability.

5. Local Storage

HTML5 also brings local storage solutions to website development. localStorage and sessionStorage are two JavaScript APIs that allow developers to store data on the user's browser without using cookies. These APIs can make websites faster because web pages can read from local storage instead of always requesting data from the server.

6. Enhanced performance

HTML5 provides many new APIs to improve performance. Among them, Web Workers are JavaScript threads that allow code to be run in the background, thereby improving performance and reducing pressure on the main thread. Web Workers can run multiple JavaScript threads in the browser at the same time, making the website responsive and smooth.

In short, HTML5 is an important advancement in web development and enables developers to create richer and more interactive websites. HTML5's semantic markup, multimedia support, new form elements, enhanced accessibility, local storage and enhanced performance all reflect its significant differences from HTML4. In the future development, HTML5 technology and functions will also be continuously updated and developed, injecting new vitality and innovation into Web development.

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