JavaScript imitation Jingdong navigation left category navigation drop-down menu effect

Home

Web Front-end

JS Tutorial

JavaScript imitation Jingdong navigation left category navigation drop-down menu effect_javascript skills

WBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWB

May 16, 2016 pm 03:08 PM

The example in this article shares with you a drop-down menu similar to the left category navigation of JD.com and Taobao Mall for your reference. The specific content is as follows

Rendering:

Implementation code:

<!DOCTYPE html>
<html>
<head>
  <meta charset="gb2312">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <title></title>
  <style>
   *{margin:0;padding:0;}
   .ul{position:relative;width:200px;height:auto;} 
   .ul li{height:24px;line-height:24px;border-bottom:1px solid #ddd;text-align:center;font-size:12px;}
   .ul li a{display:block;background:#fff;color:#000;text-decoration:none;}
   .ul li a:hover{display:block;background:#000;color:#fff;text-decoration:none;}
   .ul li div{display:none;width:400px; height:auto;position:absolute;top:0;left:200px; background:#000; color:#fff;}
   .ul li div dl dd{float:left; width:100px;}
   .ul .liname div{display:block;}
  </style>
  <script>
    window.onload=function(){
      var aLi=document.getElementsByTagName("li");
      for(var i=0;aLi.length>i;i++){
        aLi[i].i=i;
        aLi[i].onmouseover=function(){
          this.className="liname";
 
          var h1=this.i*25;
          var h2=this.getElementsByTagName("div")[0].offsetHeight;
          if(h2<h1){
            this.getElementsByTagName("div")[0].style.top=h1+'px';
          }
           
        }
        aLi[i].onmouseout=function(){
          this.className="";
        }
      }
    }
  </script>
</head>
<body>
  <ul class="ul">
    <li>
      <a href="">类别1</a>
      <div class="div">
        <dl>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
        </dl>
      </div>
    </li>
    <li>
    <a href="">类别2</a>
      <div class="div">
        <dl>
          <dd>类别2</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
        </dl>
      </div>
    </li>
    <li><a href="">类别3</a><div class="div">
        <dl>
          <dd>类别3</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
        </dl>
      </div>
      </li>
    <li><a href="">类别4</a><div class="div">
        <dl>
          <dd>类别4</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
        </dl>
      </div>
      </li>
    <li><a href="">类别5</a><div class="div">
        <dl>
          <dd>类别5</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
        </dl>
      </div>
      </li>
    <li><a href="">类别6</a><div class="div">
        <dl>
          <dd>类别6</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
        </dl>
      </div>
      </li>
    <li><a href="">类别7</a><div class="div">
        <dl>
          <dd>类别7</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
        </dl>
      </div>
      </li>
    <li><a href="">类别8</a><div class="div">
        <dl>
          <dd>类别8</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
          <dd>类别1</dd>
        </dl>
      </div>
      </li>
  </ul>
</body>
</html>

I hope this article will be helpful to everyone in learning javascript programming.

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: A Comparative Analysis for DevelopersMay 09, 2025 am 12:22 AM

The main difference between Python and JavaScript is the type system and application scenarios. 1. Python uses dynamic types, suitable for scientific computing and data analysis. 2. JavaScript adopts weak types and is widely used in front-end and full-stack development. The two have their own advantages in asynchronous programming and performance optimization, and should be decided according to project requirements when choosing.

Python vs. JavaScript: Choosing the Right Tool for the JobMay 08, 2025 am 12:10 AM

Whether to choose Python or JavaScript depends on the project type: 1) Choose Python for data science and automation tasks; 2) Choose JavaScript for front-end and full-stack development. Python is favored for its powerful library in data processing and automation, while JavaScript is indispensable for its advantages in web interaction and full-stack development.

Python and JavaScript: Understanding the Strengths of EachMay 06, 2025 am 12:15 AM

Python and JavaScript each have their own advantages, and the choice depends on project needs and personal preferences. 1. Python is easy to learn, with concise syntax, suitable for data science and back-end development, but has a slow execution speed. 2. JavaScript is everywhere in front-end development and has strong asynchronous programming capabilities. Node.js makes it suitable for full-stack development, but the syntax may be complex and error-prone.

JavaScript's Core: Is It Built on C or C ?May 05, 2025 am 12:07 AM

JavaScriptisnotbuiltonCorC ;it'saninterpretedlanguagethatrunsonenginesoftenwritteninC .1)JavaScriptwasdesignedasalightweight,interpretedlanguageforwebbrowsers.2)EnginesevolvedfromsimpleinterpreterstoJITcompilers,typicallyinC ,improvingperformance.

JavaScript Applications: From Front-End to Back-EndMay 04, 2025 am 12:12 AM

JavaScript can be used for front-end and back-end development. The front-end enhances the user experience through DOM operations, and the back-end handles server tasks through Node.js. 1. Front-end example: Change the content of the web page text. 2. Backend example: Create a Node.js server.

Python vs. JavaScript: Which Language Should You Learn?May 03, 2025 am 12:10 AM

Choosing Python or JavaScript should be based on career development, learning curve and ecosystem: 1) Career development: Python is suitable for data science and back-end development, while JavaScript is suitable for front-end and full-stack development. 2) Learning curve: Python syntax is concise and suitable for beginners; JavaScript syntax is flexible. 3) Ecosystem: Python has rich scientific computing libraries, and JavaScript has a powerful front-end framework.

JavaScript Frameworks: Powering Modern Web DevelopmentMay 02, 2025 am 12:04 AM

The power of the JavaScript framework lies in simplifying development, improving user experience and application performance. When choosing a framework, consider: 1. Project size and complexity, 2. Team experience, 3. Ecosystem and community support.

The Relationship Between JavaScript, C , and BrowsersMay 01, 2025 am 12:06 AM

Introduction I know you may find it strange, what exactly does JavaScript, C and browser have to do? They seem to be unrelated, but in fact, they play a very important role in modern web development. Today we will discuss the close connection between these three. Through this article, you will learn how JavaScript runs in the browser, the role of C in the browser engine, and how they work together to drive rendering and interaction of web pages. We all know the relationship between JavaScript and browser. JavaScript is the core language of front-end development. It runs directly in the browser, making web pages vivid and interesting. Have you ever wondered why JavaScr

See all articles

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

Roblox: Grow A Garden - Complete Mutation Guide

3 weeks agoByDDD

Roblox: Bubble Gum Simulator Infinity - How To Get And Use Royal Keys

3 weeks agoBy尊渡假赌尊渡假赌尊渡假赌

How to fix KB5055612 fails to install in Windows 10?

3 weeks agoByDDD

Nordhold: Fusion System, Explained

3 weeks agoBy尊渡假赌尊渡假赌尊渡假赌

Mandragora: Whispers Of The Witch Tree - How To Unlock The Grappling Hook

3 weeks agoBy尊渡假赌尊渡假赌尊渡假赌

Hot Tools

SublimeText3 English version

Recommended: Win version, supports code prompts!

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.

SecLists

SecLists is the ultimate security tester's companion. It is a collection of various types of lists that are frequently used during security assessments, all in one place. SecLists helps make security testing more efficient and productive by conveniently providing all the lists a security tester might need. List types include usernames, passwords, URLs, fuzzing payloads, sensitive data patterns, web shells, and more. The tester can simply pull this repository onto a new test machine and he will have access to every type of list he needs.