Today I will share with you the new form elements in HTML5 and their usage. It has certain reference value and I hope it will be helpful to everyone.
HTML5 introduces new form elements that provide some new benefits for all form elements. When designing and building web pages, we can apply these new properties and functions to any form element. Next, we will introduce how to use them in detail in the article
HTML5 New Form Element
datalist
Specifies the option list of the input field. The list is created through the option element in the datalist
Note: option The element must set the value
<form action="#" method="get"> 选课: <input type="text" list="subject" /> <datalist id="subject"> <option label="Math" value="数学" /> <option label="English" value="英语" /> <option label="Chinese" value="语文" /> </datalist> <input type="submit" /> </form>
keygen
The role is to provide a reliable method to authenticate users.
When the form is submitted, two keys will be generated, one is the private key and the other is the public key. The private key is stored on the client, and the public key is sent to the server. The public key can be used to later verify the user's client certificate
<form action="#" method="get"> 用户名<input type="text" name="username" /> 密码:<input type="password" name="password" /> <keygen name="security" /> <input type="submit" /> </form>
##output
oninput
<form oninput="c.value=parseInt(a.value)+parseInt(b.value)"> <input type="text" name="加数" id="a">+ <input type="text" name="被加数" id="b">= <output name="c" for="a b"></output> </form>
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HTML5 brings five key improvements: 1. Semantic tags improve code clarity and SEO effects; 2. Multimedia support simplifies video and audio embedding; 3. Form enhancement simplifies verification; 4. Offline and local storage improves user experience; 5. Canvas and graphics functions enhance the visualization of web pages.

The core features of HTML5 include semantic tags, multimedia support, offline storage and local storage, and form enhancement. 1. Semantic tags such as, etc. to improve code readability and SEO effect. 2. Simplify multimedia embedding with labels. 3. Offline storage and local storage such as ApplicationCache and LocalStorage support network-free operation and data storage. 4. Form enhancement introduces new input types and verification properties to simplify processing and verification.

H5 provides a variety of new features and functions, greatly enhancing the capabilities of front-end development. 1. Multimedia support: embed media through and elements, no plug-ins are required. 2. Canvas: Use elements to dynamically render 2D graphics and animations. 3. Local storage: implement persistent data storage through localStorage and sessionStorage to improve user experience.

H5 and HTML5 are different concepts: HTML5 is a version of HTML, containing new elements and APIs; H5 is a mobile application development framework based on HTML5. HTML5 parses and renders code through the browser, while H5 applications need to run containers and interact with native code through JavaScript.

Key elements of HTML5 include,,,,,, etc., which are used to build modern web pages. 1. Define the head content, 2. Used to navigate the link, 3. Represent the content of independent articles, 4. Organize the page content, 5. Display the sidebar content, 6. Define the footer, these elements enhance the structure and functionality of the web page.

There is no difference between HTML5 and H5, which is the abbreviation of HTML5. 1.HTML5 is the fifth version of HTML, which enhances the multimedia and interactive functions of web pages. 2.H5 is often used to refer to HTML5-based mobile web pages or applications, and is suitable for various mobile devices.

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.


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