HTML代码(两款HTML选项卡代码)：
第一款：非事件委托版HTML代码：
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>非事件委托</title> <style type="text/css"> * { margin: 0; padding: 0; color: #424242; font-size: 14px; } ul, li { list-style: none; } .tabBox { margin: 10px auto; width: 600px; overflow: hidden; } .tabBox ul { position: relative; top: 1px; overflow: hidden; } .tabBox ul li { /*float: left;*/ display: inline-block; margin-right: 10px; width: 80px; height: 30px; line-height: 30px; text-align: center; cursor: pointer; border: 1px solid green; } .tabBox ul li.bg { background: lightblue; border-bottom-color: lightblue; } .tabBox div { display: none; height: 100px; line-height: 100px; text-align: center; border: 1px solid green; background: lightblue; } .tabBox div.bg { display: block; } </style> </head> <body> <div class="tabBox"> <ul> <li class="bg">1</li> <li>2</li> <li>3</li> <li>4</li> <li>5</li> </ul> <div class="bg">1</div> <div>2</div> <div>3</div> <div>4</div> <div>5</div> </div> <div class="tabBox"> <ul> <li class="bg">1</li> <li>2</li> <li>3</li> <li>4</li> <li>5</li> </ul> <div class="bg">1</div> <div>2</div> <div>3</div> <div>4</div> <div>5</div> </div> <script charset="UTF-8" type="text/javascript" src="js/utils.min.js"></script> <script type="text/javascript"> var allTabBox = utils.getElementsByClass("tabBox"); for(var i = 0; i<allTabBox.length;i++){ tabChange(allTabBox[i]); } //->选项卡切换的操作封装成插件 function tabChange(tabBox){ //var tabBox = document.getElementById("curId"); var tabBoxUl = utils.firstChild(tabBox);//->第一个ul var oLis = utils.children(tabBoxUl, "li");//->第一个ul所有子元素的li var divList = utils.children(tabBox, "div");//->所有容器子元素中的div for (var i = 0; i < oLis.length; i++) { var curLi = oLis[i]; curLi.index = i; curLi.onclick = function () { //-> utils.addClass(this, "bg"); var curLiSibling = utils.siblings(this);//当前li的所有兄弟 for (var k = 0; k < curLiSibling.length; k++) { utils.removeClass(curLiSibling[k], "bg");//兄弟的都移除掉 } //-> for (k = 0; k < divList.length; k++) { k === this.index ? utils.addClass(divList[k], "bg") : utils.removeClass(divList[k], "bg"); } }; } } </script> </body> </html>
第二款：事件委托版HTML代码：
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>事件委托/事件代理</title> <style type="text/css"> * { margin: 0; padding: 0; color: #424242; font-size: 14px; } ul, li { list-style: none; } .tabBox { margin: 10px auto; width: 600px; overflow: hidden; } .tabBox ul { position: relative; top: 1px; overflow: hidden; } .tabBox ul li { /*float: left;*/ display: inline-block; margin-right: 10px; width: 80px; height: 30px; line-height: 30px; text-align: center; cursor: pointer; border: 1px solid green; } .tabBox ul li.bg { background: lightblue; border-bottom-color: lightblue; } .tabBox div { display: none; height: 100px; line-height: 100px; text-align: center; border: 1px solid green; background: lightblue; } .tabBox div.bg { display: block; } </style> </head> <body> <div class="tabBox"> <ul zhufengFlag="firUl"> <li class="bg">1</li> <li>2</li> <li>3</li> <li>4</li> <li>5</li> </ul> <div class="bg">1</div> <div>2</div> <div>3</div> <div>4</div> <div>5</div> </div> <div class="tabBox"> <ul zhufengFlag="firUl"> <li class="bg">1</li> <li>2</li> <li>3</li> <li>4</li> <li>5</li> </ul> <div class="bg">1</div> <div>2</div> <div>3</div> <div>4</div> <div>5</div> </div> <script charset="UTF-8" type="text/javascript" src="js/utils.min.js"></script> <script type="text/javascript"> //1、事件委托 //->利用了事件的冒泡传播机制，如果一个容器A中有很多的后代元素需要绑定点击事件(其他行为统同样可以)，这样的话我就不需要一个个获取绑定了，只需要给最外层的容器A绑定一个点击事件即可，这样不管里面那个元素触发了点击的行为，A点击行为对应的方法都会执行，我们在这里通过判断事件源是谁来实现不同的操作即可 var allTabBox = utils.getElementsByClass("tabBox"); for (var i = 0; i < allTabBox.length; i++) { allTabBox[i].onclick = function (e) { e = e || window.event; var curTar = e.target || e.srcElement; //->通过条件确定我们点击的是页卡区域的LI if (curTar.tagName.toUpperCase() === "LI" && curTar.parentNode.getAttribute("zhufengFlag") === "firUl") { //->让当前点击的这个LI有选中的样式,而其兄弟元素都移除选中样式 utils.addClass(curTar, "bg");//当前事件源 var curLiSibling = utils.siblings(curTar); for (var k = 0; k < curLiSibling.length; k++) { utils.removeClass(curLiSibling[k], "bg"); } //->让和当前点击LI索引对应的那个DIV有选中的样式,其余的DIV移除选中样式 var curTarIndex=utils.index(curTar); var divList=utils.nextAll(curTar.parentNode);//->父节点下所有的弟弟 for (k = 0; k < divList.length; k++) { k === curTarIndex ? utils.addClass(divList[k], "bg") : utils.removeClass(divList[k], "bg"); } } }; } </script> </body> </html>
util.js加密后的JS代码：
var utils=function(){function listToArray(a){var b,c;if(flag)return Array.prototype.slice.call(a,0);for(b=[],c=0;c<a.length;c++)b[b.length]=a[c];return b}function formatJSON(jsonStr){return"JSON"in window?JSON.parse(jsonStr):eval("("+jsonStr+")")}function offset(a){for(var b=a.offsetLeft,c=a.offsetTop,d=a.offsetParent;d;)-1===navigator.userAgent.indexOf("MSIE 8")&&(b+=d.clientLeft,c+=d.clientTop),b+=d.offsetLeft,c+=d.offsetTop,d=d.offsetParent;return{left:b,top:c}}function win(a,b){return"undefined"==typeof b?document.documentElement[a]||document.body[a]:(document.documentElement[a]=b,document.body[a]=b,void 0)}function children(a,b){var d,e,f,g,h,i,c=[];if(flag)c=this.listToArray(a.children);else{for(d=a.childNodes,e=0,f=d.length;f>e;e++)g=d[e],1===g.nodeType?c[c.length]=g:null;d=null}if("string"==typeof b)for(h=0;h<c.length;h++)i=c[h],i.nodeName.toLowerCase()!==b.toLowerCase()&&(c.splice(h,1),h--);return c}function prev(a){if(flag)return a.previousElementSibling;for(var b=a.previousSibling;b&&1!==b.nodeType;)b=b.previousSibling;return b}function next(a){if(flag)return a.nextElementSibling;for(var b=a.nextSibling;b&&1!==b.nodeType;)b=b.nextSibling;return b}function prevAll(a){for(var b=[],c=this.prev(a);c;)b.unshift(c),c=this.prev(c);return b}function nextAll(a){for(var b=[],c=this.next(a);c;)b.push(c),c=this.next(c);return b}function sibling(a){var b=this.prev(a),c=this.next(a),d=[];return b?d.push(b):null,c?d.push(c):null,d}function siblings(a){return this.prevAll(a).concat(this.nextAll(a))}function index(a){return this.prevAll(a).length}function firstChild(a){var b=this.children(a);return b.length>0?b[0]:null}function lastChild(a){var b=this.children(a);return b.length>0?b[b.length-1]:null}function append(a,b){b.appendChild(a)}function prepend(a,b){var c=this.firstChild(b);return c?(b.insertBefore(a,c),void 0):(b.appendChild(a),void 0)}function insertBefore(a,b){b.parentNode.insertBefore(a,b)}function insertAfter(a,b){var c=this.next(b);return c?(b.parentNode.insertBefore(a,c),void 0):(b.parentNode.appendChild(a),void 0)}function hasClass(a,b){var c=new RegExp("(^| +)"+b+"( +|$)");return c.test(a.className)}function addClass(a,b){var d,e,f,c=b.replace(/(^ +| +$)/g,"").split(/ +/g);for(d=0,e=c.length;e>d;d++)f=c[d],this.hasClass(a,f)||(a.className+=" "+f)}function removeClass(a,b){var d,e,f,g,c=b.replace(/(^ +| +$)/g,"").split(/ +/g);for(d=0,e=c.length;e>d;d++)f=c[d],this.hasClass(a,f)&&(g=new RegExp("(^| +)"+f+"( +|$)","g"),a.className=a.className.replace(g," "))}function getElementsByClass(a,b){var c,d,e,f,g,h,i,j,k;if(b=b||document,flag)return this.listToArray(b.getElementsByClassName(a));for(c=[],d=a.replace(/(^ +| +$)/g,"").split(/ +/g),e=b.getElementsByTagName("*"),f=0,g=e.length;g>f;f++){for(h=e[f],i=!0,j=0;j<d.length;j++)if(k=new RegExp("(^| +)"+d[j]+"( +|$)"),!k.test(h.className)){i=!1;break}i&&(c[c.length]=h)}return c}function getCss(a){var b=null,c=null;return flag?b=window.getComputedStyle(this,null)[a]:"opacity"===a?(b=this.currentStyle["filter"],c=/^alpha\(opacity=(\d+(?:\.\d+)?)\)$/,b=c.test(b)?c.exec(b)[1]/100:1):b=this.currentStyle[a],c=/^(-?\d+(\.\d+)?)(px|pt|em|rem)?$/,c.test(b)?parseFloat(b):b}function setCss(a,b){if("float"===a)return this["style"]["cssFloat"]=b,this["style"]["styleFloat"]=b,void 0;if("opacity"===a)return this["style"]["opacity"]=b,this["style"]["filter"]="alpha(opacity="+100*b+")",void 0;var c=/^(width|height|top|bottom|left|right|((margin|padding)(Top|Bottom|Left|Right)?))$/;c.test(a)&&(isNaN(b)||(b+="px")),this["style"][a]=b}function setGroupCss(a){for(var b in a)a.hasOwnProperty(b)&&setCss.call(this,b,a[b])}function css(a){var b=arguments[1],c=Array.prototype.slice.call(arguments,1);if("string"==typeof b){if("undefined"==typeof arguments[2])return getCss.apply(a,c);setCss.apply(a,c)}b=b||0,"[object Object]"===b.toString()&&setGroupCss.apply(a,c)}var flag="getComputedStyle"in window;return{win:win,offset:offset,listToArray:listToArray,formatJSON:formatJSON,children:children,prev:prev,next:next,prevAll:prevAll,nextAll:nextAll,sibling:sibling,siblings:siblings,index:index,firstChild:firstChild,lastChild:lastChild,append:append,prepend:prepend,insertBefore:insertBefore,insertAfter:insertAfter,hasClass:hasClass,addClass:addClass,removeClass:removeClass,getElementsByClass:getElementsByClass,css:css}}();