Summary of HTML5 concepts and pros and cons

1. Definition: What is HTML5?

HTML5 is the result of collaboration with WHATWG, HTML5 will be the new standard for HTML, XHTML, and HTML DOM. (In short, HTML5 is the 5.0 version of HTML)

2. What are the rules for HTML5?

• The new features should be based on HTML, CSS, DOM, and JavaScript.
• Reduce the need for external plug-ins (such as Flash)
• Better error handling
• More tags for replacing scripts
• HTML5 should be independent of the device
• The development process should be transparent to the public

Advantages and disadvantages of 3.HTML5

Advantages: A, network standards unified, HTML5 itself is recommended by the Web.

b, multi-device, cross-platform

C, instant updates.

D, improve usability and improve user's friendly experience;

E, there are several new tags, which will help developers define important content;

F, can bring more multimedia elements (video and audio) to the site;

G, can be a good alternative to flash and Silverlight;

H, when it comes to the crawl and index of the site, SEO is very friendly;

I, is used in a lot of mobile applications and games.

Cons: A, security: Like the previous FIREFOX4 Web sockets and transparent proxy implementations have serious security issues, while the Web Storage, Web sockets such features are easily exploited by hackers to steal users ' information and information.

B, perfect sex: Many features the level of support for each browser is different.

C, the technical threshold: HTML5 simplifies the work of developers while representing a lot of new properties and APIs that require developers to learn, such as web workers, Web sockets, Web Storage and other new features, background and even the knowledge of the browser principle, the opportunity is also a huge challenge

D, performance: engine problems on some platforms cause HTML5 performance to be low.

e, browser compatibility: The biggest drawback, IE9 the following browsers almost annihilated.

The reason why 4.flash is gradually replaced by HTML5

(1) The shortcomings of Flash

flash security vulnerability too large Before the slow speed, using flash compression technology can speed up the loading of video flash text cannot be search engine recognition, SEO effect is poor Core animation requires professional production, modified to be more troublesome CPU resources are relatively large, the page contains Flash animation when the page response is slow Apple's latest support, resulting in a drop in usage < Span class= "bjh-p" >flash update required manual installation

(2) HTML5 advantages

recommended by the web, there is a unified network standard cross-platform, multi-device support seo friendly, use search engine crawl and search easy game development better interactivity audio and video direct support tag code simpler and cleaner, clearer code convenient storage update-in-time features

Summary of HTML5 concepts and pros and cons