1. What does WebSocket mean in HTML5?
WebSocket is a protocol for full-duplex communication on a single TCP connection that HTML5 began to provide. WebSocket makes the data exchange between the client and the server become It is simpler and allows the server to actively push data to the client. In the WebSocket API, the browser and the server only need to complete a handshake, and a persistent connection can be created directly between the two for bidirectional data transmission.
In the WebSocket API, the browser and the server only need to perform a handshake action, and then a fast channel is formed between the browser and the server. Data can be transmitted directly between the two.
Now, in order to implement push technology, many websites use Ajax polling. Polling is when the browser issues an HTTP request to the server at a specific time interval (such as every 1 second), and then the server returns the latest data to the client's browser. This traditional model brings obvious shortcomings, that is, the browser needs to continuously send requests to the server. However, HTTP requests may contain long headers, and the real valid data may be only a small part. Obviously, this will be wasteful. A lot of bandwidth and other resources.
The WebSocket protocol defined by HTML5 can better save server resources and bandwidth, and enable more real-time communication.
The browser sends a request to the server to establish a WebSocket connection through JavaScript. After the connection is established, the client and the server can directly exchange data through the TCP connection.
After you obtain the Web Socket connection, you can send data to the server through the send() method, and receive data returned by the server through the onmessage event.
The following API is used to create WebSocket objects.
var Socket = new WebSocket(url, [protocol] );
WebSocket properties
2. What kind of protocol is Websocket and what are its specific advantages
First of all, Websocket is a persistence protocol, compared to non-persistent protocols such as HTTP.
Let’s give a simple example and use the PHP life cycle that is currently widely used to explain.
1) The life cycle of HTTP is defined by Request, that is, one Request and one Response. In HTTP 1.0, this HTTP request ends.
Improvements were made in HTTP 1.1 so that there is a keep-alive, that is to say, in one HTTP connection, multiple Requests can be sent and multiple Responses can be received.
But please remember Request = Response, this is always the case in HTTP, which means that a request can only have one response. Moreover, this response is also passive and cannot be initiated actively.
The above is the detailed content of What does WebSocket mean in HTML5. For more information, please follow other related articles on the PHP Chinese website!
H5: How It Enhances User Experience on the WebApr 19, 2025 am 12:08 AMH5 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.
Deconstructing H5 Code: Tags, Elements, and AttributesApr 18, 2025 am 12:06 AMHTML5 code consists of tags, elements and attributes: 1. The tag defines the content type and is surrounded by angle brackets, such as. 2. Elements are composed of start tags, contents and end tags, such as contents. 3. Attributes define key-value pairs in the start tag, enhance functions, such as. These are the basic units for building web structure.
Understanding H5 Code: The Fundamentals of HTML5Apr 17, 2025 am 12:08 AMHTML5 is a key technology for building modern web pages, providing many new elements and features. 1. HTML5 introduces semantic elements such as, , etc., which enhances web page structure and SEO. 2. Support multimedia elements and embed media without plug-ins. 3. Forms enhance new input types and verification properties, simplifying the verification process. 4. Offer offline and local storage functions to improve web page performance and user experience.
H5 Code: Best Practices for Web DevelopersApr 16, 2025 am 12:14 AMBest practices for H5 code include: 1. Use correct DOCTYPE declarations and character encoding; 2. Use semantic tags; 3. Reduce HTTP requests; 4. Use asynchronous loading; 5. Optimize images. These practices can improve the efficiency, maintainability and user experience of web pages.
H5: The Evolution of Web Standards and TechnologiesApr 15, 2025 am 12:12 AMWeb standards and technologies have evolved from HTML4, CSS2 and simple JavaScript to date and have undergone significant developments. 1) HTML5 introduces APIs such as Canvas and WebStorage, which enhances the complexity and interactivity of web applications. 2) CSS3 adds animation and transition functions to make the page more effective. 3) JavaScript improves development efficiency and code readability through modern syntax of Node.js and ES6, such as arrow functions and classes. These changes have promoted the development of performance optimization and best practices of web applications.
Is H5 a Shorthand for HTML5? Exploring the DetailsApr 14, 2025 am 12:05 AMH5 is not just the abbreviation of HTML5, it represents a wider modern web development technology ecosystem: 1. H5 includes HTML5, CSS3, JavaScript and related APIs and technologies; 2. It provides a richer, interactive and smooth user experience, and can run seamlessly on multiple devices; 3. Using the H5 technology stack, you can create responsive web pages and complex interactive functions.
H5 and HTML5: Commonly Used Terms in Web DevelopmentApr 13, 2025 am 12:01 AMH5 and HTML5 refer to the same thing, namely HTML5. HTML5 is the fifth version of HTML, bringing new features such as semantic tags, multimedia support, canvas and graphics, offline storage and local storage, improving the expressiveness and interactivity of web pages.
What Does H5 Refer To? Exploring the ContextApr 12, 2025 am 12:03 AMH5referstoHTML5,apivotaltechnologyinwebdevelopment.1)HTML5introducesnewelementsandAPIsforrich,dynamicwebapplications.2)Itsupportsmultimediawithoutplugins,enhancinguserexperienceacrossdevices.3)SemanticelementsimprovecontentstructureandSEO.4)H5'srespo
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
AI Hentai Generator
Generate AI Hentai for free.
Hot Article
Hot Tools
SecLists
SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.
WebStorm Mac version
Useful JavaScript development tools
ZendStudio 13.5.1 Mac
Powerful PHP integrated development environment
Safe Exam Browser
Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.
MinGW - Minimalist GNU for Windows
This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.
