This article mainly introduces HTML5+CSS3 to implement drag-and-drop upload of images without plug-ins (supports preview and batch). Now html5 provides API and powerful APIs such as File, FileReader, XMLHttpRequest, etc., which provide us with drag-and-drop upload. possible. Those who are interested can find out. Uploading is basically something that often occurs in projects. It is generally used: 1. form submission 2. flash3, HTML5 form submission will refresh the page, and it is difficult to upload asynchronously; flash may be used more because it can take into account almost all browsing I have always used jQuery's uploadify as the upload tool in the project. Uploadify is also based on Html5 and seems to be charged. You can go to the official website to take a look. Of course, now html5 provides API and powerful functions such as File, FileReader, XMLHttpRequest, etc. API provides the possibility for us to drag and drop to upload. Rendering 1: Rendering 2: Because the local upload is too fast, I recorded an 80M gif, and finally you can see the detailed effect of the upload.
Introduction: This article It mainly introduces HTML5+CSS3 to realize drag-and-drop uploading of images without plug-ins (supports preview and batch). Now html5 provides API and powerful APIs such as File, FileReader, XMLHttpRequest, etc., which makes it possible for us to drag-and-drop to upload images. Those who are interested can find out.
2. HTML5/CSS3 classic case - drag and drop to upload images without plug-in (2)
Introduction: The previous article has implemented the overall HTML and CSS of this project: HTML5 CSS3 Classic case: Drag and drop to upload images without plug-ins (supports preview and batch) (1) This This blog is directly based on the previous one. The final effect is: Effect Picture 1: Effect Picture 2: Okay, please allow me to post the picture twice so that everyone can see the effect~ You can see the li of our picture. HTML is actually quite complicated, so I made some modifications to the html document:
3. HTML5/CSS3 classic case - drag and drop upload of images without plug-in (1)
Introduction: form submission will refresh the page, making it difficult to upload asynchronously; flash may be more useful More, because it can take into account almost all browsers. I have always used jQuery's uploadify as the upload tool in the project. Uploadify is also based on Html5 and seems to be paid. You can go to the official website to take a look; of course, now html5 provides API and powerful APIs such as File, FileReader, XMLHttpRequest, etc. provide the possibility for us to drag and drop to upload.
4. JS HTML5 drag and drop upload image preview
##Introduction: This article mainly introduces the relevant information of JS HTML5 drag and drop upload image preview in detail. It has certain reference value. Interested friends can refer to it
5. html5 Drag and drop upload image example demonstration_html5 tutorial skills
I refer to a foreign photo album for the interface style The website has not changed much, except that the birdsong has been converted into Chinese, and the style of uploading has also been changed. The reason why I chose this is that it is easy for me to expand. It supports 3 ways to add pictures, one is drag and drop. Upload, a conventional option" width="400">
Introduction: The most important thing about drag-and-drop upload is the js part of the code, which implements 70% of the functions. In addition 30% just submit the image information to the background, and then perform corresponding processing, such as compression, cropping, etc. Friends who are interested can refer to it. I hope it can help you
[Related Q&A Recommendations]:
javascript - Ask for ideas on how to implement drag-and-drop uploading of images using js
The above is the detailed content of Detailed introduction to drag and drop to upload images. For more information, please follow other related articles on the PHP Chinese website!

Both Python and JavaScript's choices in development environments are important. 1) Python's development environment includes PyCharm, JupyterNotebook and Anaconda, which are suitable for data science and rapid prototyping. 2) The development environment of JavaScript includes Node.js, VSCode and Webpack, which are suitable for front-end and back-end development. Choosing the right tools according to project needs can improve development efficiency and project success rate.

Yes, the engine core of JavaScript is written in C. 1) The C language provides efficient performance and underlying control, which is suitable for the development of JavaScript engine. 2) Taking the V8 engine as an example, its core is written in C, combining the efficiency and object-oriented characteristics of C. 3) The working principle of the JavaScript engine includes parsing, compiling and execution, and the C language plays a key role in these processes.

JavaScript is at the heart of modern websites because it enhances the interactivity and dynamicity of web pages. 1) It allows to change content without refreshing the page, 2) manipulate web pages through DOMAPI, 3) support complex interactive effects such as animation and drag-and-drop, 4) optimize performance and best practices to improve user experience.

C and JavaScript achieve interoperability through WebAssembly. 1) C code is compiled into WebAssembly module and introduced into JavaScript environment to enhance computing power. 2) In game development, C handles physics engines and graphics rendering, and JavaScript is responsible for game logic and user interface.

JavaScript is widely used in websites, mobile applications, desktop applications and server-side programming. 1) In website development, JavaScript operates DOM together with HTML and CSS to achieve dynamic effects and supports frameworks such as jQuery and React. 2) Through ReactNative and Ionic, JavaScript is used to develop cross-platform mobile applications. 3) The Electron framework enables JavaScript to build desktop applications. 4) Node.js allows JavaScript to run on the server side and supports high concurrent requests.

Python is more suitable for data science and automation, while JavaScript is more suitable for front-end and full-stack development. 1. Python performs well in data science and machine learning, using libraries such as NumPy and Pandas for data processing and modeling. 2. Python is concise and efficient in automation and scripting. 3. JavaScript is indispensable in front-end development and is used to build dynamic web pages and single-page applications. 4. JavaScript plays a role in back-end development through Node.js and supports full-stack development.

C and C play a vital role in the JavaScript engine, mainly used to implement interpreters and JIT compilers. 1) C is used to parse JavaScript source code and generate an abstract syntax tree. 2) C is responsible for generating and executing bytecode. 3) C implements the JIT compiler, optimizes and compiles hot-spot code at runtime, and significantly improves the execution efficiency of JavaScript.

JavaScript's application in the real world includes front-end and back-end development. 1) Display front-end applications by building a TODO list application, involving DOM operations and event processing. 2) Build RESTfulAPI through Node.js and Express to demonstrate back-end applications.


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

WebStorm Mac version
Useful JavaScript development tools

mPDF
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),

EditPlus Chinese cracked version
Small size, syntax highlighting, does not support code prompt function

DVWA
Damn Vulnerable Web App (DVWA) is a PHP/MySQL web application that is very vulnerable. Its main goals are to be an aid for security professionals to test their skills and tools in a legal environment, to help web developers better understand the process of securing web applications, and to help teachers/students teach/learn in a classroom environment Web application security. The goal of DVWA is to practice some of the most common web vulnerabilities through a simple and straightforward interface, with varying degrees of difficulty. Please note that this software

SublimeText3 English version
Recommended: Win version, supports code prompts!
