Course Introduction：To implement advanced H5 drag and drop file upload function, the key is to use HTML5 drag and drop API and file API, and handle user experience, file type restrictions, multi-file upload and status feedback. 1. Create drag-and-drop areas and listen to dragover, dragleave and drop events; 2. Get file objects in drop events and perform type and size verification; 3. Use XMLHttpRequest to implement file upload and listen to upload progress; 4. Support the control of concurrency quantity during multi-file upload to optimize performance; 5. Provide visual feedback such as highlighted areas, loading prompts and progress bars to improve user experience.
2025-07-21 comment 0 483
Course Introduction：AJAX File Upload with FormDataProblem:Using FormData for file upload in an AJAX request with dynamic HTML generated using drag and drop...
2024-12-18 comment 0 792
Course Introduction：Six Excellent jQuery File Upload Plugins for Easy Integration This article showcases six user-friendly jQuery file upload plugins, many offering drag-and-drop and multiple file selection capabilities. Let's dive in! jQuery uploadprogress: This plu
2025-02-26 comment 0 933
Course Introduction：HTML5 natively supports drag and drop function, and interacts by setting draggable attributes and listening to dragstart, dragover, and drop events. 1. Set the element draggable="true" to enable drag; 2. Use dataTransfer.setData() to pass data in dragstart; 3. The target area listens to the dragover and blocks the default behavior to allow placement; 4. Get data and process content in the drop event; precautions include cross-domain restrictions, visual feedback, mobile compatibility and file upload support. Mastering these key points can achieve basic drag-and-drop interaction.
2025-07-15 comment 0 150
Course Introduction：To implement the web page drag and drop function, first set the element draggable="true" and listen for the dragstart event to define the drag data; secondly, add dragover, dragenter and drop event listeners to the target area, and call e.preventDefault() in the dragover to allow placement; if you need to upload a file, get e.dataTransfer.files in the drop event to process the file object; finally, you can improve the user experience through style feedback such as highlighted borders. Master these key points to flexibly apply drag and drop functions in the project.
2025-07-25 comment 0 759
Course Elementary 13845
Course Introduction：Scala Tutorial Scala is a multi-paradigm programming language, designed to integrate various features of object-oriented programming and functional programming.
Course Elementary 82394
Course Introduction："CSS Online Manual" is the official CSS online reference manual. This CSS online development manual contains various CSS properties, definitions, usage methods, example operations, etc. It is an indispensable online query manual for WEB programming learners and developers! CSS: Cascading Style Sheets (English full name: Cascading Style Sheets) is an application used to express HTML (Standard Universal Markup Language).
Course Elementary 13193
Course Introduction：SVG is a markup language for vector graphics in HTML5. It maintains powerful drawing capabilities and at the same time has a very high-end interface to operate graphics by directly operating Dom nodes. This "SVG Tutorial" is intended to allow students to master the SVG language and some of its corresponding APIs, combined with the knowledge of 2D drawing, so that students can render and control complex graphics on the page.
Course Elementary 24651
Course Introduction：In the "AngularJS Chinese Reference Manual", AngularJS extends HTML with new attributes and expressions. AngularJS can build a single page application (SPAs: Single Page Applications). AngularJS is very easy to learn.
Course Elementary 27503
Course Introduction：Go is a new language, a concurrent, garbage-collected, fast-compiled language. It can compile a large Go program in a few seconds on a single computer. Go provides a model for software construction that makes dependency analysis easier and avoids most C-style include files and library headers. Go is a statically typed language, and its type system has no hierarchy. Therefore users do not need to spend time defining relationships between types, which feels more lightweight than typical object-oriented languages. Go is a completely garbage-collected language and provides basic support for concurrent execution and communication. By its design, Go is intended to provide a method for constructing system software on multi-core machines.
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