富贵资源网

JavaScript实战之菜单特效
站长资源 2024/11/13 佚名
64 1538
富贵资源网 Design By www.hznty.com

本文将持续添加我自己用原生JS写的各种菜单特效，虽然网上一搜一大堆，但我还是喜欢自己来写一写！
 这是上一篇：JavaScript实战（带收放动画效果的导航菜单）
下面是经过优化后的完整代码，优化了CSS样式、简化事件函数、减少HTML层级，删了至少20行以上的冗余代码 

<!DOCTYPE html>
<html lang="en">
<head>
 <meta charset="UTF-8">
 <title></title>
 <script>
 window.onload = function() {
 //========伸缩动画菜单
 var ul = document.getElementById('ul');
 if(ul.addEventListener){
 ul.addEventListener('mouseover',listener1,true);
 ul.addEventListener('mouseout',listener2,true);
 ul.addEventListener('click',listener3,false);
 }else if(ul.attachEvent){ //兼容IE8及以前版本
 ul.attachEvent('onmouseover',listener1,false);
 ul.attachEvent('onmouseout',listener2,false);
 ul.attachEvent('onclick',listener3,false);
 }
 function listener1(event){
 //event = event||window.event; //兼容IE8及以前版本
 var target = event.target||event.srcElement; //兼容IE8及以前版本
 if(target.tagName.toLowerCase() === 'li') {
  var div1 = target.getElementsByTagName('div')[0];
  div1.style.display = 'block';
  div1.style.opacity = 1;
 }
 }
 function listener2(event){
 //event = event||window.event;
 var target = event.target||event.srcElement;
 if(target.tagName.toLowerCase() === 'li'){
  var div1 = target.getElementsByTagName('div')[0];
  div1.style.display = 'none';
  div1.style.opacity = 0;
  div1.onmouseover = function(){
  div1.style.display = 'block';
  div1.style.opacity = 1;
  };
  div1.onmouseout = function(){
  div1.style.display = 'none';
  div1.style.opacity = 0;
  };
 }
 }
 var bool = true;
 function listener3(event) {
 var event = event || window.event;
 var target = event.target || event.srcElement;
 if (target.className === 'show-hide') {
  var adiv = target.nextElementSibling;
  if (window.getComputedStyle(adiv,null).opacity>0.5){bool=false}else{bool=true}
  var height = 90,
  changeH,
  opacity,
  id;
  if (bool) {
  changeH = 0;
  opacity = 0;
  var text = target.innerHTML.slice(0,-1);
  target.innerHTML = text+' -';
  (function show() {
  if (changeH > height) {clearTimeout(id);return}
  changeH += 5;
  opacity += 0.06;
  console.log('opacity:'+adiv.style.opacity+',height :'+adiv.style.height);
  adiv.style.height = changeH + 'px';
  adiv.style.opacity = opacity;
  adiv.style.display = 'block';
  id = setTimeout(function () {
  clearTimeout(id);
  show();
  }, 16.7);
  })();
  bool = false;
  } else {
  changeH = height;
  opacity = 1;
  var text = target.innerHTML.slice(0,-1);
  target.innerHTML = text+' +';
  (function hidden() {
  if (changeH < 0) {clearTimeout(id);adiv.style.display = 'none';return}
  changeH -= 10;
  opacity -= 0.11;
  console.log('opacity:'+adiv.style.opacity+',height :'+adiv.style.height);
  adiv.style.height = changeH + 'px';
  adiv.style.opacity = opacity;
  id = setTimeout(function () {
  clearTimeout(id);
  hidden();
  }, 16.7);
  })();
  bool = true;
  }
 }
 }
 };
 </script>
 <style>
 *{
 margin: 0;
 padding: 0;
 }
 a,img{border:0;}
 ul{
 position: absolute;
 top: 20px;
 left: 30px;
 z-index: 100;
 }
 #ul li{
 display: inline-block;
 position: relative;
 height: 30px;
 text-align: center;
 line-height: 30px;
 padding: 3px;
 border: 1px solid gray;
 border-radius: 10px 10px 0 0;
 background-color: aliceblue;
 cursor: pointer;
 -webkit-transition: all ease-in-out 0.3s;
 -moz-transition: all ease-in-out 0.3s;
 -ms-transition: all ease-in-out 0.3s;
 -o-transition: all ease-in-out 0.3s;
 transition: all ease-in-out 0.3s;
 }
 #ul li:hover{background-color: aquamarine;}
 .nav-div{
 position: absolute;
 width: 100%;
 left: -1px;
 top: 37px;
 display: none;
 border: 1px solid gray;
 border-top: 0;
 border-radius:0 0 10px 10px;
 background-color: aliceblue;
 }
 .show-hide{
 position: relative;
 display: block;
 border-radius:0 0 10px 10px;
 background-color: lightblue;
 -webkit-transition: all ease-in-out 0.3s;
 -moz-transition: all ease-in-out 0.3s;
 -ms-transition: all ease-in-out 0.3s;
 -o-transition: all ease-in-out 0.3s;
 transition: all ease-in-out 0.3s;
 border-bottom: 1px solid gray;
 }
 .show-hide:hover{background-color: lavender}
 .a-div{
 background-color: aliceblue;
 display: none;
 border-radius:0 0 10px 10px;
 opacity: 0}
 .a{
 z-index: -1;
 display: block;
 text-decoration: none;
 border-radius:10px;
 -webkit-transition: all ease-in-out 0.3s;
 -moz-transition: all ease-in-out 0.3s;
 -ms-transition: all ease-in-out 0.3s;
 -o-transition: all ease-in-out 0.3s;
 transition: all ease-in-out 0.3s;
 }
 .a:hover{background-color: lavender}
 </style>
</head>
<body>
<ul id="ul">
 <li>JavaScript实战
 <div class="nav-div">
 <span class="show-hide">导航特效 +</span>
 <div class="a-div">
 <a class="a" href="">可收放子菜单</a>
 <a class="a" href="">切换页面</a>
 <a class="a" href="">持续添加中...</a>
 </div>
 <span class="show-hide">其它特效 +</span>
 <div class="a-div">
 <a class="a" href="">持续添加中...</a>
 <a class="a" href="">持续添加中...</a>
 <a class="a" href="">持续添加中...</a>
 </div>
 </div>
 </li>
 <li>JavaScript性能优化
 <div class="nav-div">
 <span class="show-hide">财经 +</span>
 <div class="a-div">
 <a class="a" href="">今日头条</a>
 <a class="a" href="">所有新闻</a>
 <a class="a" href="">往日回看</a>
 </div>
 <span class="show-hide">科技 +</span>
 <div class="a-div">
 <a class="a" href="">今日头条</a>
 <a class="a" href="">所有新闻</a>
 <a class="a" href="">往日回看</a>
 </div>
 </div>
 </li>
 <li>今日新闻
 <div class="nav-div">
 <span class="show-hide">财经 +</span>
 <div class="a-div">
 <a class="a" href="">今日头条</a>
 <a class="a" href="">所有新闻</a>
 <a class="a" href="">往日回看</a>
 </div>
 <span class="show-hide">科技 +</span>
 <div class="a-div">
 <a class="a" href="">今日头条</a>
 <a class="a" href="">所有新闻</a>
 <a class="a" href="">往日回看</a>
 </div>
 </div>
 </li>
</ul>
</body>
</html>

效果图：

JavaScript实战之菜单特效

下面是第二个特效：（具体实现比第一个简单很多，主要注意CSS布局）

<!DOCTYPE html>
<html lang="en">
<head>
 <meta charset="UTF-8">
 <title></title>
 <style>
 *{
  margin: 0;
  padding: 0;
 }
 a,img{border:0;}
 #menu{
  position: absolute;
  top: 30px;
  left: 0;
  right: 0;
  margin: auto;
  width: 400px;
  border-left: 1px solid gray;
  border-top: 1px solid gray;
  background-color: lemonchiffon;
  text-align: center;
 }
 #menu li{
  list-style: none;
  float: left;
  width: 99px;
  height: 30px;
  line-height: 30px;
  border-right: 1px solid gray;
  background-color: burlywood;
  color: white;
  -webkit-transition: all ease-in-out 0.5s;
  -moz-transition: all ease-in-out 0.5s;
  -ms-transition: all ease-in-out 0.5s;
  -o-transition: all ease-in-out 0.5s;
  transition: all ease-in-out 0.5s;
 }
 #menu li:hover{
  background-color: lemonchiffon;
  color: #336699;
 }
 .contain{
  position: absolute;
  left: -1px;
  display: none;
  width: 399px;
  height: 300px;
  color: #336699;
  border-left: 1px solid gray;
  border-right: 1px solid gray;
  border-bottom: 1px solid gray;
  background-color: lemonchiffon;
 }
 </style>
 <script>
 window.onload = function(){
  var menu = document.getElementById('menu');
  if(menu.addEventListener){
  menu.addEventListener('mouseover',show,false);
  menu.addEventListener('mouseout',hide,false);
  }else if(menu.attachEvent){
  menu.attachEvent('onmouseover',show,false);
  menu.attachEvent('onmouseout',hide,false);
  }
  function show(event){
  var target = event.target||event.srcElement;
  if(target.tagName.toLowerCase() === 'li'){
   target.firstElementChild.style.display = 'block';
  }else if(target.parentNode.tagName.toLowerCase() === 'li'){
   target.style.display = 'block';
  }
  }
  function hide(event){
  var target = event.target||event.srcElement;
  if(target.tagName.toLowerCase() === 'li'){
   target.firstElementChild.style.display = 'none';
  }else if(target.parentNode.tagName.toLowerCase() === 'li'){
   target.style.display = 'none';
  }
  }
 }
 </script>
</head>
<body>
<div id="menu">
 <ul>
 <li id="menu1">苏福的特效1
  <div class="contain">111111111111</div>
 </li>
 <li id="menu2">苏福的特效2
  <div class="contain">222222222222</div>
 </li>
 <li id="menu3">苏福的特效3
  <div class="contain">333333333333</div>
 </li>
 <li id="menu4">苏福的特效4
  <div class="contain">444444444444</div>
 </li>
 </ul>
</div>
</body>
</html>

效果图：

JavaScript实战之菜单特效

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。

富贵资源网 Design By www.hznty.com
广告合作：本站广告合作请联系QQ：858582 申请时备注：广告合作（否则不回）
免责声明：本站资源来自互联网收集,仅供用于学习和交流,请遵循相关法律法规,本站一切资源不代表本站立场,如有侵权、后门、不妥请联系本站删除！
富贵资源网 Design By www.hznty.com
www.hznty.com 富贵资源网
20,135影音资源
44,641技术资源
2,817软件资源
435,032站长资源

友情链接

杰晶网络 DDR爱好者之家 桃源资源网 杰网资源 富贵资源网 南强小屋 铁雪资源网 幽灵资源网 万梅资源网 狼山资源网 白云岛资源网 昆仑资源网 相思资源网 明霞山资源网 内蒙古资源网 黑松山资源网 茶园资源网 饿虎岗资源网 大旗谷资源网 常春岛资源网 岱庙资源网 兴国资源网 快活林资源网 蝙蝠岛资源网 帝王谷资源网 白云城资源网 伏龙阁资源网 清风细雨楼 天枫庄资源网 圆月山庄资源网 无争山庄资源网 神水资源网 移花宫资源网 神剑山庄资源网 无为清净楼资源网 金钱帮资源网 丐帮资源网 华山资源网 极乐门资源网 小李飞刀资源网 凤求凰客栈 风云阁资源网 金狮镖局 鸳鸯亭资源网 千金楼资源网 更多链接
富贵资源网 Design By www.hznty.com