The following editor will bring you a detailed explanation of HTML5 Web storage. The editor thinks it’s pretty good, so I’ll share it with you now and give it as a reference. Come and have a look with the editor, I wish you all a happy game
Storing data on the client
HTML5 provides two types of data on the client A new way to store data on the client side:
• localStorage - No time limit for data storage
• sessionStorage - Before data storage for a session
, these are all done by cookies. But cookies are not suitable for storing large amounts of data because they are passed with each request to the server, which makes cookies slow and inefficient.
In HTML5, data is not passed by every server request, but instead the data is only used when requested. It makes it possible to store large amounts of data without affecting website performance.
For different websites, data is stored in different areas, anda website can only access its own data.
HTML5 uses JavaScript to store and access data.
localStorage method
The data stored by the localStorage method has no time limit. The data is still available after the next day, week or year. How to create and access localStorage:XML/HTML CodeCopy content to clipboard
<!DOCTYPE HTML> <html> <body> <script type="text/javascript"> localStorage.lastname="Smith"; document.write("Last name: " + localStorage.lastname); </script> </body> </html>
XML/HTML CodeCopy content To clipboard
<!DOCTYPE HTML> <html> <body> <script type="text/javascript"> if (localStorage.pagecount) { localStorage.pagecount=Number(localStorage.pagecount) +1; } else { localStorage.pagecount=1; } document.write("Visits: " + localStorage.pagecount + " time(s)."); </script> <p>刷新页面会看到计数器在增长。</p> <p>请关闭浏览器窗口,然后再试一次,计数器会继续计数。</p> </body> </html>
sessionStorage method
sessionStorage method is for a session Perform data storage. The data is deleted when the user closes the browser window. How to create and access a sessionStorage:JavaScript CodeCopy content to clipboard
<!DOCTYPE HTML> <html> <body> <script type="text/javascript"> sessionStorage.lastname="Smith"; document.write(sessionStorage.lastname); </script> </body> </html>
Copy content to clipboard
<!DOCTYPE HTML> <html> <body> <script type="text/javascript"> if (sessionStorage.pagecount) { sessionStorage.pagecount=Number(sessionStorage.pagecount) +1; } else { sessionStorage.pagecount=1; } document.write("Visits " + sessionStorage.pagecount + " time(s) this session."); </script> <p>刷新页面会看到计数器在增长。</p> <p>请关闭浏览器窗口,然后再试一次,计数器已经重置了。</p> </body> </html>
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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.

HTML5 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.

HTML5 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.

Best 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.

Web 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.


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