In html5, drag and drop is supported APIInterface. Through this function, data can be dragged and dropped between the browser and other applications. To achieve this operation, you must go through the following two steps
(1) Set the draggable attribute of the object you want to drag and drop to true. In this way, the tag can be dragged and dropped. In addition, the img tag and a tag must be specified as true, and drag and drop is allowed by default. (2) Write the
event processing code related to drag and drop. Commonly used playback events are as follows: dragstart starts the drag and drop operation
drag During the drag and drop process
dragenter is The dragged and dropped label begins to enter the scope of this label
dragover The dragged and dropped label is moving within the scope of this label
dragleave The dragged and dropped label leaves the scope of this label
drop There are other labels being dragged Put it in this tag
dragend The drag-and-drop operation ends
<!DOCTYPE HTML> <html> <head> <meta charset="utf-8"> <title>拖放</title> <script type="text/javascript"> function init() { // (1) 拖放开始 source.addEventListener("dragstart", function(ev) { //(1) 向dataTransfer对象追加数据 var dt = ev.dataTransfer; dt.effectAllowed = 'all'; //(2) 拖动元素为dt.setData("text/plain", this.id); dt.setData("text/plain", "你好"); }, false); // (3) dragend:拖放结束 dest.addEventListener("dragend", function(ev) { //不执行默认处理(拒绝被拖放) ev.preventDefault(); }, false); // (4) drop:被拖放 dest.addEventListener("drop", function(ev) { // 从DataTransfer对象那里取得数据 var dt = ev.dataTransfer; //(5) 不执行默认处理(拒绝被拖放) ev.preventDefault(); //停止事件传播 ev.stopPropagation(); }, false); } </script> </head> <body onload="init()"> <h5 id="请拖放">请拖放</h5> </html>In the above code, the inint() event is automatically triggered when the page is loaded. This event includes three functions: start dragging, being dragged and dropped, and ending dragging. Open the webpage in the browser, drag the mouse to display the evening pictures on the webpage, and the webpage will automatically load the required content.
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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.

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.


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