search
HomeWeb Front-endJS TutorialUse button tags to implement three-state picture buttons_form special effects

Three-state image buttons are essential for a good user experience. I did some processing of dom events and implemented a three-state button without changing the html. The key to the following solution is to remove the dotted selection box and position the background without using loop processing. Any button will automatically become a three-state button as long as the background image and border are defined as 0.


[Ctrl A Select all Note: If you need to introduce external Js, you need to refresh it before it can be executed
]

There are a few more solutions to the above The only drawback is that under Firefox, you cannot use the Tab key to locate the button. This is because the click event is blocked in order to remove the virtual frame. The following program solves this problem by creating a new, invisible button within the button that shifts the focus.

[Ctrl A select all Note:
If you need to introduce external Js, you need to refresh to execute <script> if(document.all) document.execCommand("BackgroundImageCache",false,true) document.body.onload=function(){ if(document.activeElement.tagName=="BUTTON") document.activeElement.blur() } document.onmouseover=document.onmouseout=document.onmousedown=document.onmouseup=function(e){ var ee=e==null?event.srcElement:e.target e=e||event if(ee.tagName!="BUTTON"||ee.clientWidth!=ee.offsetWidth) return if(e.type=="mousedown"){ ee.style.backgroundPosition="0 -"+(2*ee.offsetHeight) if(document.all) ee.hideFocus=true else return false } if(e.type=="mouseover"||e.type=="mouseup") ee.style.backgroundPosition="0 -"+ee.offsetHeight if(e.type=="mouseout") ee.style.backgroundPosition="0 0" } </script>]<script> if(document.all) document.execCommand("BackgroundImageCache",false,true) document.body.onload=function(){ if(document.activeElement.tagName=="BUTTON") document.activeElement.blur() } document.onmouseover=document.onmouseout=document.onmousedown=document.onmouseup=function(e){ var o,ee=e==null?event.srcElement:e.target e=e||event if(ee.tagName=="BUTTON"&&ee.clientWidth==ee.offsetWidth){ if(e.type=="mousedown"){ if((ee.lastChild||"").tagName!="BUTTON"){ o=document.createElement("button") o.style.cssText="position:absolute;left:-9000" ee.appendChild(o) ee.onfocus=function(){ee.lastChild.focus()} } ee.style.backgroundPosition="0 -"+(2*ee.offsetHeight) } if(e.type=="mouseover"||e.type=="mouseup") ee.style.backgroundPosition="0 -"+ee.offsetHeight if(e.type=="mouseout") ee.style.backgroundPosition="0 0" } } </script>
Statement
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Python vs. JavaScript: Development Environments and ToolsPython vs. JavaScript: Development Environments and ToolsApr 26, 2025 am 12:09 AM

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.

Is JavaScript Written in C? Examining the EvidenceIs JavaScript Written in C? Examining the EvidenceApr 25, 2025 am 12:15 AM

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's Role: Making the Web Interactive and DynamicJavaScript's Role: Making the Web Interactive and DynamicApr 24, 2025 am 12:12 AM

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: The Connection ExplainedC and JavaScript: The Connection ExplainedApr 23, 2025 am 12:07 AM

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.

From Websites to Apps: The Diverse Applications of JavaScriptFrom Websites to Apps: The Diverse Applications of JavaScriptApr 22, 2025 am 12:02 AM

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 vs. JavaScript: Use Cases and Applications ComparedPython vs. JavaScript: Use Cases and Applications ComparedApr 21, 2025 am 12:01 AM

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.

The Role of C/C   in JavaScript Interpreters and CompilersThe Role of C/C in JavaScript Interpreters and CompilersApr 20, 2025 am 12:01 AM

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 in Action: Real-World Examples and ProjectsJavaScript in Action: Real-World Examples and ProjectsApr 19, 2025 am 12:13 AM

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.

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

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

Hot Tools

Safe Exam Browser

Safe Exam Browser

Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SAP NetWeaver Server Adapter for Eclipse

SAP NetWeaver Server Adapter for Eclipse

Integrate Eclipse with SAP NetWeaver application server.

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

EditPlus Chinese cracked version

EditPlus Chinese cracked version

Small size, syntax highlighting, does not support code prompt function