search
HomeWeb Front-endHTML TutorialDetailed explanation of the steps to create CSS3 secondary navigation menu

This time I will bring you a detailed explanation of the steps to create a CSS3 secondary navigation menu. What are the precautions for creating a CSS3 secondary navigation menu? Here is a practical case, let’s take a look.

If we want to realize the secondary navigation of the web page, we can use JS technology to dynamically display and hide the secondary menu. Of course, we can also use CSS technology to achieve it. And it is recommended to use CSS here because it is more efficient and smoother. Here we will introduce the dynamic display and hiding of secondary menus.

1 Structure

We mainly use ul li tags for the main body of general navigation

    <header>
        <!-- 一级导航开始 -->
        <nav>
            <ul>
                <li>
                    <a>首页</a>
                </li>
                <li>
                    <a>产品</a>
                    <!-- 二级导航开始 -->
                    <ul>
                        <li><a>小程序</a></li>
                        <li><a>微信</a></li>
                        <li><a>企业站</a></li>
                    </ul>
                    <!-- 二级导航结束 -->
                </li>
                <li>
                    <a>服务</a>
                    <!-- 二级导航开始 -->
                    <ul>
                        <li><a>技术支持</a></li>
                        <li><a>产品外包</a></li>
                    </ul>
                    <!-- 二级导航结束 -->
                </li>
                <li><a>关于我们</a></li>
                <li><a>人才招聘</a></li>
            </ul>
        </nav>
        <!-- 一级导航结束 -->
    </header>

2 Layout

Navigation layout, because the child elements must follow the parent elements, so select the positioning layout for the secondary menu. If you want multiple li to be displayed in one line, you need to float the li.

    body{margin: 0; font-size: 14px; color: #666}
        ul,ol{margin: 0;padding: 0; list-style: none;}
        a {text-decoration: none; color: #666;}
        /*一级导航*/
        /*背景色*/
        ul.menu,ul.submenu {
            background-color: #ededed;
        }
        /*一级导航浮动*/
        ul.menu::after {
            content: '';
            display: block;
            clear: both;
        }
        ul.menu > li {
            float: left;
            width: 120px;
            line-height: 3em;
            height: 3em;
            text-align: center;
            cursor:pointer;
        }
    
        /*二级导航项分割线*/
        ul.submenu {
            /*默认隐藏*/
            display: none;
        }
        ul.submenu > li {
            border-bottom: 1px solid #fff;
        }
        
        /*内容区*/
        .content {
            min-height: 800px;
            background-color: #fff;
        }

3. Secondary menu display special effects

When the cursor is placed on the navigation, the background color of the current element becomes darker and the font color becomes lighter.

If there is a secondary menu, display the secondary menu

In order to achieve the above two special effects, we can use the pseudo class selector (:hover) to capture the cursor hover operation. And use the pseudo-class selector (:hover) to select the secondary menu corresponding to the current menu

Use the following CSS to quickly implement this effect.

        /*选中特效*/
        ul.menu > li:hover {
            background-color: #666;
        }
        ul.menu > li:hover > a {
            color: #fff;
        }
        ul.menu > li:hover > ul.submenu {
            display: block;
        }

4. Animation

The display of the secondary menu in the above code is instantaneous. If you can provide a slow animation transition effect, of course it is no problem. Here you need to use animation to configure the animation, so you can write the animation frames yourself or seek support from a third-party code library (animate.css). Here I will use transparency to achieve this fade-in effect

        /*动画帧*/
        @keyframes fade {
            from {
                opacity: 0;
            }
            to {
                opacity: 1;
            }
        }
        /*基础动画样式*/
        .animated {
            animation-duration: 1s;
            animation-fill-mode: both;
        }
        .fadeIn {
            animation-name: fade;
            animation-direction: normal;
        }

After the animation is defined, you can directly reference the animation style to ul.submenu. Note that if you are using animate.css, then the above steps will be omitted. Just use the good animation styles it provides.

        <!-- 二级导航开始 -->
        
        

I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!

Recommended reading:

Detailed explanation of the use of H5 WebWorkers multi-thread development

CSS and media query to realize web page navigation function (attached Code)

The above is the detailed content of Detailed explanation of the steps to create CSS3 secondary navigation menu. For more information, please follow other related articles on the PHP Chinese website!

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
css怎么隐藏元素但不占空间css怎么隐藏元素但不占空间Jun 01, 2022 pm 07:15 PM

两种方法:1、利用display属性,只需给元素添加“display:none;”样式即可。2、利用position和top属性设置元素绝对定位来隐藏元素,只需给元素添加“position:absolute;top:-9999px;”样式。

原来利用纯CSS也能实现文字轮播与图片轮播!原来利用纯CSS也能实现文字轮播与图片轮播!Jun 10, 2022 pm 01:00 PM

怎么制作文字轮播与图片轮播?大家第一想到的是不是利用js,其实利用纯CSS也能实现文字轮播与图片轮播,下面来看看实现方法,希望对大家有所帮助!

css3什么是自适应布局css3什么是自适应布局Jun 02, 2022 pm 12:05 PM

自适应布局又称“响应式布局”,是指可以自动识别屏幕宽度、并做出相应调整的网页布局;这样的网页能够兼容多个不同的终端,而不是为每个终端做一个特定的版本。自适应布局是为解决移动端浏览网页而诞生的,能够为使用不同终端的用户提供很好的用户体验。

css3如何实现鼠标点击图片放大css3如何实现鼠标点击图片放大Apr 25, 2022 pm 04:52 PM

实现方法:1、使用“:active”选择器选中鼠标点击图片的状态;2、使用transform属性和scale()函数实现图片放大效果,语法“img:active {transform: scale(x轴放大倍数,y轴放大倍数);}”。

css3动画效果有变形吗css3动画效果有变形吗Apr 28, 2022 pm 02:20 PM

css3中的动画效果有变形;可以利用“animation:动画属性 @keyframes ..{..{transform:变形属性}}”实现变形动画效果,animation属性用于设置动画样式,transform属性用于设置变形样式。

css3怎么设置动画旋转速度css3怎么设置动画旋转速度Apr 28, 2022 pm 04:32 PM

在css3中,可以利用“animation-timing-function”属性设置动画旋转速度,该属性用于指定动画将如何完成一个周期,设置动画的速度曲线,语法为“元素{animation-timing-function:速度属性值;}”。

css3线性渐变可以实现三角形吗css3线性渐变可以实现三角形吗Apr 25, 2022 pm 02:47 PM

css3线性渐变可以实现三角形;只需创建一个45度的线性渐变,设置渐变色为两种固定颜色,一个是三角形的颜色,另一个为透明色即可,语法“linear-gradient(45deg,颜色值,颜色值 50%,透明色 50%,透明色 100%)”。

一文了解CSS3中的新特性 ::target-text 选择器一文了解CSS3中的新特性 ::target-text 选择器Apr 12, 2022 am 11:24 AM

本篇文章带大家一起深入了解一下CSS3中的新特性::target-text 选择器,聊聊该选择器的作用和使用方法,希望对大家有所帮助!

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

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
2 weeks agoBy尊渡假赌尊渡假赌尊渡假赌
Repo: How To Revive Teammates
4 weeks agoBy尊渡假赌尊渡假赌尊渡假赌
Hello Kitty Island Adventure: How To Get Giant Seeds
4 weeks agoBy尊渡假赌尊渡假赌尊渡假赌

Hot Tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

ZendStudio 13.5.1 Mac

ZendStudio 13.5.1 Mac

Powerful PHP integrated development environment

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.

PhpStorm Mac version

PhpStorm Mac version

The latest (2018.2.1) professional PHP integrated development tool