The differences are: 1. The difference in definition, HTML4 is produced to adapt to the PC era, and HTML5 is produced to adapt to the mobile Internet era; 2. The difference in tags, HTML5 code is more concise than HTML4 code; 3 , HTML5 adds a variety of elements; 4. HTML5 is more suitable for the requirements of the times.
The operating environment of this tutorial: Windows7 system, HTML4&&HTML5 version, Dell G3 computer.
HTML5 has developed at an alarming rate since its official launch in 2010. Now mainstream browsers basically support HTML5 (except for some individual features that have browser compatibility issues). This shows that HTML5 is becoming more and more popular. welcome. It can be predicted that HTML5 will become the mainstream technology of web front-end in the near future. HTML5 special effects are better adapted to the mobile Internet era and can better support multimedia running on mobile devices.
What is the difference between html5 and html4?
Difference in definition
HTML5 is the fifth modification of Hypertext Markup Language (HTML), HTML4 is Hypertext Markup Language (HTML) The fourth revision, they are the 5th and 4th versions of the HTML language respectively. HTML4 was produced to adapt to the PC era, and HTML5 was produced to adapt to the mobile Internet era. They are all standard languages recommended by w3c (World Wide Web).
The difference between tags
HTML5 code is more concise than HTML4 code. Some new elements and new attributes of HTML5 can make web development easier and simpler, such as HTML5 Improved API. Before HTML5, many functions had to be implemented using JavaScript, but now you can just use the tag attributes of HTML5 elements. Because HTML5 has a large number of replaceable script (javascript) attributes on web pages, it makes the language simple and easy to understand, and HTML4 alone needs to cooperate with javascript to achieve this.
New elements
HTML5 adds canvas element (painting), video element (media playback), audio element, new special content elements (article, footer, header, nav, section), form controls (calendar, date, time, email, url, search), for example, the div used before can now be replaced by HTML5 structured tags, which makes the entire page more intuitive and easy to understand.
HTML5 is more suitable for the requirements of the times
The mobile Internet era is more eager to have a unified standard than the PC era. Previously, due to the inconsistency between browsers, a lot of time was wasted due to bugs caused by modifying browser compatibility. In HTML5, video, audio, images, and animations will be standardized, which will solve the headache of browser compatibility.
The difference between markup methods
HTML5 syntax is mainly DOCTYPE (DOCTYPE declaration method: ) and specified character encoding (append charset attribute to mate element Specified encoding:
Recommended learning: html video tutorial
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The core features of HTML5 include semantic tags, multimedia support, offline storage and local storage, and form enhancement. 1. Semantic tags such as, etc. to improve code readability and SEO effect. 2. Simplify multimedia embedding with labels. 3. Offline storage and local storage such as ApplicationCache and LocalStorage support network-free operation and data storage. 4. Form enhancement introduces new input types and verification properties to simplify processing and verification.

H5 provides a variety of new features and functions, greatly enhancing the capabilities of front-end development. 1. Multimedia support: embed media through and elements, no plug-ins are required. 2. Canvas: Use elements to dynamically render 2D graphics and animations. 3. Local storage: implement persistent data storage through localStorage and sessionStorage to improve user experience.

H5 and HTML5 are different concepts: HTML5 is a version of HTML, containing new elements and APIs; H5 is a mobile application development framework based on HTML5. HTML5 parses and renders code through the browser, while H5 applications need to run containers and interact with native code through JavaScript.

Key elements of HTML5 include,,,,,, etc., which are used to build modern web pages. 1. Define the head content, 2. Used to navigate the link, 3. Represent the content of independent articles, 4. Organize the page content, 5. Display the sidebar content, 6. Define the footer, these elements enhance the structure and functionality of the web page.

There is no difference between HTML5 and H5, which is the abbreviation of HTML5. 1.HTML5 is the fifth version of HTML, which enhances the multimedia and interactive functions of web pages. 2.H5 is often used to refer to HTML5-based mobile web pages or applications, and is suitable for various mobile devices.

HTML5 is the latest version of the Hypertext Markup Language, standardized by W3C. HTML5 introduces new semantic tags, multimedia support and form enhancements, improving web structure, user experience and SEO effects. HTML5 introduces new semantic tags, such as, ,, etc., to make the web page structure clearer and the SEO effect better. HTML5 supports multimedia elements and no third-party plug-ins are required, improving user experience and loading speed. HTML5 enhances form functions and introduces new input types such as, etc., which improves user experience and form verification efficiency.

How to write clean and efficient HTML5 code? The answer is to avoid common mistakes by semanticizing tags, structured code, performance optimization and avoiding common mistakes. 1. Use semantic tags such as, etc. to improve code readability and SEO effect. 2. Keep the code structured and readable, using appropriate indentation and comments. 3. Optimize performance by reducing unnecessary tags, using CDN and compressing code. 4. Avoid common mistakes, such as the tag not closed, and ensure the validity of the code.

H5 improves web user experience with multimedia support, offline storage and performance optimization. 1) Multimedia support: H5 and elements simplify development and improve user experience. 2) Offline storage: WebStorage and IndexedDB allow offline use to improve the experience. 3) Performance optimization: WebWorkers and elements optimize performance to reduce bandwidth consumption.


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