原生js编写焦点图效果
网络编程 2021-07-04 19:19www.168986.cn编程入门
这篇文章主要为大家详细介绍了原生js编写焦点图效果,具有一定的参考价值,感兴趣的小伙伴们可以参考一下
自己用原生js写的简单焦点图,算是对原生js初步运用。
html部分
<div class="focusPicture"> <section class="mPhoto" id="mPhoto"> <img src="images/20161021/b_5809b93b66d18.jpg"/> </section><!-- 主要的大图 --> <section class="oPhoto"> <div class="imgWrap"> <section class="on"> <img src="images/20161021/b_5809b93b66d18.jpg"/> </section> <section> <img src="images/20161021/b_5809b96c4da53.jpg"/> </section> <section> <img src="images/20161021/b_5809b9bea39c4.jpg"/> </section> <section> <img src="images/20161021/b_5809ba288384e.jpg"/> </section> <section> <img src="images/20161021/b_5809bae42fa81.jpg"/> </section> <section> <img src="images/20161021/b_5809ba288384e.jpg"/> </section> <section> <img src="images/20161021/b_5809bb3da0bbc.jpg"/> </section> </div> </section><!-- 其他的小图 --> <section class="prevNext"> <div class="prev"> <i></i> </div><!-- 上一张 --> <div class="next"> <i></i> </div><!-- 下一张 --> </section><!-- 上下翻页 --> </div><!-- 焦点图区 -->
js部分
window.onload = function(){ /焦点图特效/ var mPhoto = document.getElementById("mPhoto"); var imgWrap = document.getElementsByClassName("imgWrap")[0]; var wrapSize = 4; /图片容器最大显示图片数/ if(imgWrap.getElementsByTagName("section").length>wrapSize){ imgWrap.innerHTML = imgWrap.innerHTML+imgWrap.innerHTML; } var oImages = imgWrap.getElementsByTagName("section"); for(var i = 0 ; i<oImages.length; i++) { oImages[i].onmouseover = function() { for(var j = 0 ; j<oImages.length; j++) { removeClass(oImages[j],"on"); } var imgSrc = this.getElementsByTagName("img")[0].src; addClass(this,"on"); mPhoto.getElementsByTagName("img")[0].src = imgSrc; } } /上下翻页容器/ var oPrevNext = document.getElementsByClassName("prevNext")[0]; var oPrev = oPrevNext.getElementsByClassName("prev")[0]; var oNext = oPrevNext.getElementsByClassName("next")[0]; var oImageHeight = oImages[0].getElementsByTagName("img")[0].height||0; var oPositionTop = imgWrap.offsetTop; var imgIndex = 0; if(oImages.length>wrapSize2) { oPrev.style.display = "block"; oNext.style.display = "block"; } /上一页/ oPrev.onclick=function() { imgIndex-=1; if(imgIndex<=0){ imgIndex = 6; } var oTop = imgIndex(oImageHeight+8); imgWrap.style. = -oTop+"px"; /获取当前图片的索引/ for(var i = 0 ; i<oImages.length; i++) { var oBol = hasClass(oImages[i],"on")||false; if(oBol){ var index = oIndex(oImages[i],oImages); index=index-1; if(imgIndex==6){ index = 6; } for(var j = 0 ; j<oImages.length; j++) {/清除其他的图片on样式/ removeClass(oImages[j],"on"); } addClass(oImages[index],"on"); var imgSrc = oImages[index].getElementsByTagName("img")[0].src; mPhoto.getElementsByTagName("img")[0].src = imgSrc; return false; } } } /下一页/ oNext.onclick = function() { imgIndex+=1; if(imgIndex>=6){ imgIndex = 0; } var oTop = imgIndex(oImageHeight+8); imgWrap.style. = -oTop+"px"; /获取当前图片的索引/ for(var i = 0 ; i<oImages.length; i++) { var oBol = hasClass(oImages[i],"on")||false; if(oBol){ var index = oIndex(oImages[i],oImages); index=index+1; if(imgIndex==0){ index = 1; } for(var j = 0 ; j<oImages.length; j++) {/清除其他的图片on样式/ removeClass(oImages[j],"on"); } addClass(oImages[index],"on"); var imgSrc = oImages[index].getElementsByTagName("img")[0].src; mPhoto.getElementsByTagName("img")[0].src = imgSrc; return false; } } } } function hasClass(element,cName) {//检查class是否存在 return !!element.className.match(new RegExp('(\\s|^)'+cName+'(\\s|$)')); } function addClass(element,cName) {//添加一个class if(!hasClass(element,cName)) { element.className +=' '+cName; } } function removeClass(element,cName) {//移除一个class if(hasClass(element,cName)) { element.className = element.className.replace(new RegExp('(\\s|^)'+cName+'(\\s|$)'),' '); } } function oIndex(current, obj) {/获取索引/ for (var i = 0, length = obj.length; i<length; i++) { if (obj[i] == current) { return i; } } }
css部分
.productInfo .focusPicture{ width: 698px; float: left; position: relative; border-right: 1px solid #d9cdb4; } .productInfo .focusPicture .mPhoto{ width: 542px; height: 360px; } .productInfo .focusPicture .mPhoto img{ width: 100%; height: 100%; } .productInfo .focusPicture .oPhoto{ width: 128px; height: 352px; position: absolute; right: 14px; : 4px; overflow: hidden; } .productInfo .oPhoto div{ width: 128px; position: absolute; left:0; :0; -webkit-transition: .2s ease-out; -moz-transition: .2s ease-out; transition: .2s ease-out; } .productInfo .oPhoto section{ height: 78px; margin: 8px 0; position: relative; cursor: pointer; } .productInfo .oPhoto section::before { content: ""; display: block; width: 100%; height: 100%; background-color: rgba(255,255,255,.42); position: absolute; left: 0; : 0; } .productInfo .oPhoto section.on::before{ display: none; } .productInfo .focusPicture .oPhoto img{ width: 100%; height: 100%; } .productInfo .focusPicture .prevNext{ width: 32px; height: 32px; position: absolute; : -4px; right: 62px; } .productInfo .prevNext div.prev, .productInfo .prevNext div.next{ width: 32px; height: 32px; -webkit-border-radius: 50%; -moz-border-radius: 50%; border-radius: 50%; background-color: #fff; position: absolute; left: 0; -webkit-transition: all .25s; -moz-transition: all .25s; transition: all .25s; display: none; cursor: pointer; } .productInfo .prevNext div.prev{ : 0; box-shadow: 0 -2px 4px rgba(0,0,0,.24); } .productInfo .prevNext div.next{ : 336px; box-shadow: 0 2px 4px rgba(0,0,0,.24); } .productInfo .prevNext div.prev:hover{ box-shadow: 2px -2px 3px rgba(0,0,0,.24); } .productInfo .prevNext div.next:hover{ box-shadow: -2px 2px 3px rgba(0,0,0,.24); } .productInfo .prevNext div.prev i, .productInfo .prevNext div.next i{ width: 16px; height: 16px; position: absolute; : 0; right: 0; bottom: 0; left: 0; margin: auto; cursor: pointer; } .productInfo .prevNext div.prev i{ background: url(../images/arrows-icon.png) 0 -16px no-repeat; background-size: 48px 32px; bottom: 2px; } .productInfo .prevNext div.next i{ background: url(../images/arrows-icon.png) 0 0 no-repeat; background-size: 48px 32px; : 2px; } .productInfo .prevNext div.prev:hover i, .productInfo .prevNext div.next:hover i{ -webkit-transform: scale(1.1); -moz-transform: scale(1.1); transform: scale(1.1); } .productInfo .prevNext div.prev:hover i{ background: url(../images/arrows-icon.png) -16px -16px no-repeat; background-size: 48px 32px; } .productInfo .prevNext div.next:hover i{ background: url(../images/arrows-icon.png) -16px 0px no-repeat; background-size: 48px 32px; } .productInfo .prevNext div.prev:active i{ background: url(../images/arrows-icon.png) -32px -16px no-repeat; background-size: 48px 32px; } .productInfo .prevNext div.next:active i{ background: url(../images/arrows-icon.png) -32px 0px no-repeat; background-size: 48px 32px; }
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