一、遍歷的接口分爲 祖先 同胞兄弟 後代 過濾javascript
基礎知識: nodeType 元素類型 節點類型 元素 1 屬性 2 文本 3 註釋 8 文檔 9html
nodeName 元素節點的nodeName是標籤名稱 屬性節點的nodeName是屬性名稱 文本節點的nodeName永遠是 #text 文檔節點的nodeName永遠是 #documentjava
二、同胞遍歷的例子:node
<!-- lang: html --> <!DOCTYPE HTML> <!-- lang: html --> <html> <!-- lang: html --> <head> <!-- lang: html --> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <!-- lang: html --> <script src="http://img.mukewang.com/down/540812440001e40e00000000.js" type="text/javascript"></script> <!-- lang: html --> <!-- <script type="text/javascript" src="../jquery-2.1.1.js"></script> --> <!-- lang: html --> <title></title> <!-- lang: html --> </head> <!-- lang: html --> <body> <!-- lang: html --> <!-- lang: html --> <button id="test1">jQuery遍歷同胞</button> <!-- lang: html --> <button id="test2">模擬遍歷同胞</button> <!-- lang: html --> <!-- lang: html --> <ul class="level-1"> <!-- lang: html --> <li class="item-i">I</li> <!-- lang: html --> <li class="item-ii">II <!-- lang: html --> <ul class="level-2"> <!-- lang: html --> <li class="item-a">A</li> <!-- lang: html --> <li class="item-b">B <!-- lang: html --> <ul class="level-3"> <!-- lang: html --> <li class="item-1">1</li> <!-- lang: html --> <li class="item-2">2</li> <!-- lang: html --> <li class="item-3">3</li> <!-- lang: html --> </ul> <!-- lang: html --> </li> <!-- lang: html --> <li class="item-c">C</li> <!-- lang: html --> </ul> <!-- lang: html --> </li> <!-- lang: html --> <li class="item-iii">III</li> <!-- lang: html --> </ul> <!-- lang: html --> <!-- lang: html -->
js代碼jquery
function dir(elem, dir, until) { var matched = [], truncate = until !== undefined; while ((elem = elem[dir]) && elem.nodeType !== 9) { if (elem.nodeType === 1) { if (truncate) { if (elem.nodeName.toLowerCase() == until || elem.className == until) { break; } } matched.push(elem); } } return matched; }ui
function nextAll(elem) { return dir(elem, "nextSibling"); }code
function prevAll(elem) { return dir(elem, "previousSibling"); }htm
function nextUntil(elem, until) { return dir(elem, "nextSibling", until); }接口
function prevUntil(elem, until) { return dir(elem, "previousSibling", until); }ip
$("#test1").click(function(){ var item = $('li.item-ii'); alert(item.nextAll()[0].className) alert(item.prevAll()[0].className) alert(item.nextUntil('.end')[0].className) alert(item.prevUntil('.first')[0].className) })
$("#test2").click(function(){ var item = document.querySelectorAll('li.item-ii')[0] alert(nextAll(item)[0].className) alert(prevAll(item)[0].className) alert(nextUntil(item, '.end')[0].className) alert(prevUntil(item, '.first')[0].className) })