Even well-formed HTML pages can be difficult to process due to a lack of structure. The level of the heading must be analyzed to see how the sections are divided. Sidebars, footers, headers, navigation bars, main content areas, and individual articles are all represented by common div elements. HTML 5 adds some new elements specifically to identify these common structures:
· section: This can be a chapter or section in a book, in fact anything that has its own title in HTML 4 · header: the header that appears on the page; separate from the head element Same · footer: footer; can display signature in email · nav: a set of links to other pages · article: an article in a blog, magazine, article compilation, etc.
Let’s consider a typical blog homepage, which has a header at the top, a footer at the bottom, several articles, a navigation area and a sidebar. See Code 1 for a typical blog page.
"/blog/birding/2007/04/23/spring-comes-and-goes-in-sussex-county/"> Spring Comes (and Goes) in Sussex County
Yesterday I joined the Brooklyn Bird Club for our annual trip to Western New Jersey, specifically Hyper Humus, a relatively recently discovered hot spot. It started out as a nice winter morning when we arrived at the site at 7:30 A.M., progressed to Spring around 10:00 A.M., and reached early summer by 10:15.
"/blog/birding/2007/04/23/but-does-it-count-for-your-life -list/"> But does it count for your life list?
Seems you can now go href="http: //www.wired.com/science/discoveries/news/ 2007/04/cone_sf">bird watching via the Internet. I haven't been able to test it out yet (20 user limit apparently) but this is certainly cool. Personally, I can't imagine it replacing actually being out in the field by any small amount. On the other hand, I've always found it quite sad to meet senior birders who are no longer able to hold binoculars steady or get to the park. I can imagine this might be of some interest to them. At least one elderly birder did a big year on TV, after he could no longer get out so much. This certainly tops that.
Even with the correct indentation, these nested divs still feel very confusing. In HTML 5, these elements can be replaced with semantic elements, see Code 2 for a typical blog page written in HTML5
"/blog/birding/2007/04 /23/spring-comes-and-goes-in-sussex-county/"> Spring Comes (and Goes) in Sussex County
Yesterday I joined the Brooklyn Bird Club for our annual trip to Western New Jersey, specifically Hyper Humus, a relatively recently discovered hot spot. It started out as a nice winter morning when we arrived at the site at 7:30 A.M., progressed to Spring around 10:00 A.M., and reached early summer by 10:15.
"/blog/birding/2007/04/23/but-does-it-count-for-your-life-list/"> But does it count for your life list?
Seems you can now go href="http://www.wired.com/science/discoveries/news/ 2007/04/cone_sf">bird watching via the Internet. I haven't been able to test it out yet (20 user limit apparently) but this is certainly cool. Personally, I can't imagine it replacing actually being out in the field by any small amount. On the other hand, I've always found it quite sad to meet senior birders who are no longer able to hold binoculars steady or get to the park. I can imagine this might be of some interest to them. At least one elderly birder did a big year on TV, after he could no longer get out so much. This certainly tops that.
Now the div is no longer needed. You no longer need to set the class attribute yourself, the meaning of each part can be inferred from the standard element name. This is especially important for audio browsers, mobile browsers, and other non-standard browsers.
(To be continued)
Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
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.
H5 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 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.
mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),