js实现轮播图效果 z-index实现轮播图
本文实例为大家分享了js实现轮播图效果的具体代码,供大家参考,具体内容如下
实现轮播图
学习前端差不多两三个月,在这里记录分享一下。因本人菜鸟一枚,希望大佬们多多指点,勿喷。
通过计算每一张图片高度实现滑动轮播图
HTML代码:
<div class="fate"> <div class="lancer"> <ul class="saber"> <li><img src="img/illust_13010631_20191118_150928.jpg"></li> <li><img src="img/illust_13010631_20191118_150928.jpg"></li> <li><img src="img/illust_13010631_20191118_150928.jpg"></li> <li><img src="img/illust_13010631_20191118_150928.jpg"></li> <li><img src="img/illust_13010631_20191118_150928.jpg"></li> </ul> </div> </div> <div class="archer"> <button class="goup" onclick="goup()"><</button> <button class="godown" onclick="godown()">></button> </div>
CSS代码:
* { transition: all 1s; margin: 0px; padding: 0px; } .fate { position: absolute; top: 0%; width: 512px; height: 512px; overflow: hidden; } ul li { list-style: none; } .lancer{ position: absolute; top: 0%; width: 100%; height: 100%; } .saber { top: 0px; position: absolute; } .archer{ position: absolute; } button { z-index: 99; }
JS代码:
var index=0; function godown(){ var li = document.getElementsByTagName("li"); //获取单个li宽度(单张图片高度) var liHeight = li[0].scrollHeight; var goup=document.getElementsByClassName("goup"); var lancer=document.getElementsByClassName("lancer")[0]; if(index<4){ index++; }else{ index=0; } lancer.style.top = -index*liHeight+"px"; } function goup(){ var li = document.getElementsByTagName("li"); //获取单个li宽度(单张图片高度) var liHeight = li[0].scrollHeight; var goup=document.getElementsByClassName("goup"); var lancer=document.getElementsByClassName("lancer")[0]; if(index>0){ index--; }else{ index=4; } lancer.style.top = -index*liHeight+"px"; }
如有错误望指出。
利用z-index实现轮播图
HTML代码
<div class="fate"> <div class="saber"> <ul> <li class="archer active"><img src="img/illust_13010631_20191118_150928.jpg"></li> <li class="archer"><img src="img/illust_13010631_20191118_150928.jpg"></li> <li class="archer"><img src="img/illust_13010631_20191118_150928.jpg"></li> <li class="archer"><img src="img/illust_13010631_20191118_150928.jpg"></li> <li class="archer"><img src="img/illust_13010631_20191118_150928.jpg"></li> </ul> </div> </div> <div class="lancer"> <button id="goup">></button> <button id="godown"><</button> </div>
CSS代码
li { list-style: none; } .archer { position: absolute; top: 0%; display: none; } .active { display: block; } button { position: absolute; top: 70%; width: 50px; } #goup { left: 400px; } #godown { left: 0px; }
JS代码
var pic = document.getElementsByTagName("li"); var archer = document.getElementsByClassName("archer"); var goup = document.getElementById("goup"); var godown = document.getElementById("godown"); var index = 0; goup.onclick = function() { for (var i = 0; i < pic.length; i++) { pic[i].className = "archer"; } if (index < 4) { index++; } else { index = 0; } pic[index].className = "active"; } godown.onclick = function() { for (var i = 0; i < pic.length; i++) { pic[i].className = "archer"; } if (index > 0) { index--; } else { index = 4; } pic[index].className = "active"; }
利用index来实现轮播,但是生硬。
结语
以上就是两种方法实现轮播图效果。
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我们。
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