HTML5 gives web pages better meaning and structure. Richer tags will come with support for RDFa, microdata and microformats, building a data-driven Web that is more valuable to both programs and users. In this article, we will share with you how to implement the desktop notification prompt function in HTML5.
The specific code is as follows:
<button id="button">有人想加你为好友</button> <p id="text"></p> ;(function (){ if(window.Notification){ var btn = document.getElementById("button"); var txt = document.getElementById("text"); btn.onclick = function (){ if(Notification.permission == "granted"){ popNotice(); }else if(Notification.permission != "denied"){ Notification.requestPermission().then(function (permission){ popNotice() }) } }; function popNotice(){ if(Notification.permission == "granted"){ var notification = new Notification("你好:",{ body:"请问今晚有空吗", icon:"http://image.zhangxinxu.com/左边头像地址" }); notification.onclick = function (){ txt.innerHTML = new Date().toTimeString().split(" ")[0]+"收到信息"; notification.close(); } } } }else{ console.log("浏览器不支持Notification"); } })();
HTML5 Desktop Notification Notification API Usage
html5 Desktop Notification (Web Notifications) Example Analysis_html5 Tutorial Skills
H5 Example of Implementing Desktop Notification and Prompt Function
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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.

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.


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