Explain my problem:
I want to make a JS special effect
What special effect?
A background color keeps rotating on several DIVs
Example:
Gray background, displayed in gray on one DIV; after 2 seconds, it will appear gray on the next DIV; after 2 seconds, it will appear gray on the next DIV DIV is gray;
Reply to discussion (solution)
> ;
<script> <br /> $(function(){ <br /> var divs = $("#main div"); <br /> var current = 0; <br /> setInterval(function(){ <br /> $(divs).each (function(){ <br /> $(this).css("background-color","red"); <br /> }); <br /> $(divs).each(function(e){ <br /> if(e==current){ <br /> $(divs[e]).css("background-color","black"); <br /> current ; <br /> if(current>=divs.length){ current=0;} <br /> return false; <br /> } <br /> }); <br /> },2000); <br /> }); <br /> </script>
> ;
$('div:odd').addClass("class1");$('div:even').addClass("class2");
$('div:odd').addClass("class1");$('div:even').addClass("class2"); Ignore the above, you need to setInterval
var idx=0;setInterval(function(){var divs = $('div');divs .removeClass("classShow");$('div:eq('+idx+')').addClass("classShow");idx++;idx=idx%divs.length;},2000);
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>Document</title></head><body> <style> .normal { width: 100px; height: 100px; border: solid 1px gray; margin: 10px; } .current { background-color: gray; } </style> <div id="container"> <div class="normal">1</div> <div class="normal">2</div> <div class="normal">3</div> <div class="normal">4</div> </div> <script> setInterval( play, 1000 * 2 ); // 获取所有的div play.divs = document.getElementById( "container" ).getElementsByTagName( "div" ); // 计时器 play.count = 0; function play() { var divs = play.divs; for (var i = 0; i < divs.length; i++) { if ( i === play.count % divs.length ) { divs[ i ].className = "normal current"; continue; } divs[ i ].className = "normal"; } play.count++; } </script></body></html> 
What is the purpose of the <datalist> element?Mar 21, 2025 pm 12:33 PMThe article discusses the HTML <datalist> element, which enhances forms by providing autocomplete suggestions, improving user experience and reducing errors.Character count: 159
What is the purpose of the <progress> element?Mar 21, 2025 pm 12:34 PMThe article discusses the HTML <progress> element, its purpose, styling, and differences from the <meter> element. The main focus is on using <progress> for task completion and <meter> for stati
What is the purpose of the <meter> element?Mar 21, 2025 pm 12:35 PMThe article discusses the HTML <meter> element, used for displaying scalar or fractional values within a range, and its common applications in web development. It differentiates <meter> from <progress> and ex
What is the viewport meta tag? Why is it important for responsive design?Mar 20, 2025 pm 05:56 PMThe article discusses the viewport meta tag, essential for responsive web design on mobile devices. It explains how proper use ensures optimal content scaling and user interaction, while misuse can lead to design and accessibility issues.
What is the purpose of the <iframe> tag? What are the security considerations when using it?Mar 20, 2025 pm 06:05 PMThe article discusses the <iframe> tag's purpose in embedding external content into webpages, its common uses, security risks, and alternatives like object tags and APIs.
How do I use the HTML5 <time> element to represent dates and times semantically?Mar 12, 2025 pm 04:05 PMThis article explains the HTML5 <time> element for semantic date/time representation. It emphasizes the importance of the datetime attribute for machine readability (ISO 8601 format) alongside human-readable text, boosting accessibilit
How do I use HTML5 form validation attributes to validate user input?Mar 17, 2025 pm 12:27 PMThe article discusses using HTML5 form validation attributes like required, pattern, min, max, and length limits to validate user input directly in the browser.
What are the best practices for cross-browser compatibility in HTML5?Mar 17, 2025 pm 12:20 PMArticle discusses best practices for ensuring HTML5 cross-browser compatibility, focusing on feature detection, progressive enhancement, and testing methods.
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
AI Hentai Generator
Generate AI Hentai for free.
Hot Article
Hot Tools
SublimeText3 English version
Recommended: Win version, supports code prompts!
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),
SAP NetWeaver Server Adapter for Eclipse
Integrate Eclipse with SAP NetWeaver application server.
SublimeText3 Mac version
God-level code editing software (SublimeText3)
MantisBT
Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.
