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This article is to share with you the abbreviation of what html5 is. The editor thinks it is very practical, so share it with you as a reference and follow the editor to have a look.

Html5 is the abbreviation of HyperText Markup Language5; HTML5 technology combines the relevant standards of HTML4.01 and innovates to meet the requirements of modern network development; HTML5 is composed of different technologies, which has been widely used in the Internet, providing more standard machines to enhance network applications.

This article operating environment: windows7 system, HTML5 version, Dell G3 computer.

HTML5 is the abbreviation of HyperText Markup Language 5, HTML5 technology combined with the relevant standards of HTML4.01 and innovation, in line with the requirements of modern network development, officially released in 2008. HTML5 is composed of different technologies, and it has been widely used in the Internet, providing more standard machines to enhance network applications. Compared with the traditional technology, the grammatical features of HTML5 are more obvious and combine the content of SVG. These contents can be used in web pages to deal with multimedia content more easily, and HTML5 also combines other elements to adjust and modify the original functions and standardize the work. HTML5 has formed a stable version in 2012.

What's new:

HTML5 brings Web into a mature application platform on which video, audio, image, animation and interaction with devices are standardized.

Intelligent form

The form is the main part of realizing the interaction between the user and the background of the page, and HTML5 is more powerful in the design of the form. The diversity of input types and attributes greatly enhances the form form that HTML can express, coupled with the addition of some new form tags, so that the controls that originally needed JavaScript to achieve can be directly achieved using HTML5 forms; some functions, such as content hints, focus processing, data verification and other functions, can also be completed through HTML5 smart form attribute tags.

Drawing canvas

HTML5's canvas element can achieve canvas function, this element through the built-in API combined with the use of JavaScript scripting language to draw graphics and processing on the web page, with the realization of drawing lines, arcs and rectangles, filling areas with styles and colors, writing styled text, and adding images, and using JavaScript to control each pixel. The canvas element of HTML5 allows browsers to display graphics or animated images directly without plug-ins such as Flash or Silverlight.

Multimedia

One of the biggest features of HTML5 is to support audio and video. By adding two tags to support the use of audio and video in multimedia, as long as these two tags are embedded in the Web web page, the audio and video playback function can be realized without a third-party plug-in (such as Flash). HTML5's support for audio and video files makes browsers get rid of the dependence on plug-ins, speeds up the loading speed of pages, and expands the development space of Internet multimedia technology.

Geographic positioning

Nowadays, mobile network is very popular, and users have higher and higher requirements for the application of real-time positioning. By introducing the API of Geolocation, HTML5 can realize the positioning function of users through GPS or network information, and the positioning is more accurate and flexible. Through HTML5 positioning, you can not only locate your own location, but also get other people's location information when others are open to you.

Data storage

Compared with the traditional data storage, HTML5 has its own storage mode, which allows large-scale data storage on the client side. To meet different needs, HTML5 supports both DOM Storage and Web SQL Database storage mechanisms. Among them, DOM Storage is suitable for basic local storage with key/value pairs, while WebSQLDatabase is suitable for relational database storage, developers can use SQL syntax to query, insert and other operations.

Multithreading

HTML5 uses Web Worker to liberate Web applications from the original single-threaded industry, and multithreaded operations can be achieved by creating a Web Worker object. The Web programs created by JavaScript deal with transactions in a single thread and have a long response time. When the JavaScript is too complex, deadlocks may occur. HTML5 adds a new WebWorkerAPI, which allows users to create multiple threads in the background and hand over time-consuming processing to the backstage without affecting the user interface and response speed, and these processes will not be interrupted by user interaction. Using background threads, you cannot access pages and window objects, but background threads can interact with pages. The data interaction between the child thread and the child thread is roughly as follows: ① first creates the child thread that sends data; ② executes the task of the child thread and sends the data to the main thread; ③ creates the child thread that receives the data when the main thread receives the message sent back by the child thread, and then transmits the message returned in the child thread that sends the data to the child thread that receives the data; ④ executes the code in the receiving data child thread.

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