兼容浏览器的insertAdjacentHTML
参数资料:
msdn.microsoft.com/en-us/library/ms536452(VS.85).aspx
www.w3.org/TR/2000/REC-DOM-Level-2-Traversal-Range-20001113/ranges.html#Level2-Range-setStartBefore
https://developer.mozilla.org/en/DOM/range.createContextualFragment
www.never-online.net/blog/article.asp?id=113
首先是IE里有 insertAdjacentHTML,而且很好用。为了兼容其它浏览器就有了如下的函数“insertHTML”
重点:
1、为了兼容其它浏览器,支持beforeBegin、afterBegin、beforeEnd、afterEnd
2、如何将字符串String转换为文档碎片(fragment)或是Dom树(Dom tree),因为使用innerHTML无法指定位置。
将字符串转换为Dom tree,参数这里:range.createContextualFragment,contextual翻译过来好像是“语境”的意思??
range的起始位置的设置,参数setStartBefore、setStartAfter
下面就是完整的代码了(IE中可根据需要是否返回附加的dom):
/** * * * @param {HTMLElement} el * @param {String} where beforeBegin、afterBegin、beforeEnd、afterEnd * @param {String} html */ function insertHTML(el, where, html) { if (!el) { return false; } where = where.toLowerCase(); if (el.insertAdjacentHTML) {//IE el.insertAdjacentHTML(where, html); } else { var range = el.ownerDocument.createRange(), frag = null; switch (where) { case "beforebegin": range.setStartBefore(el); frag = range.createContextualFragment(html); el.parentNode.insertBefore(frag, el); return el.previousSibling; case "afterbegin": if (el.firstChild) { range.setStartBefore(el.firstChild); frag = range.createContextualFragment(html); el.insertBefore(frag, el.firstChild); } else { el.innerHTML = html; } return el.firstChild; case "beforeend": if (el.lastChild) { range.setStartAfter(el.lastChild); frag = range.createContextualFragment(html); el.appendChild(frag); } else { el.innerHTML = html; } return el.lastChild; case "afterend": range.setStartAfter(el); frag = range.createContextualFragment(html); el.parentNode.insertBefore(frag, el.nextSibling); return el.nextSibling; } } }
完整的代码示例:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html> <head> <title>兼容浏览器的insertAdjacentHTML</title> <meta name="generator" content="editplus" /> <meta name="author" content="" /> <meta name="keywords" content="" /> <meta name="description" content="" /> <meta http-equiv='content-type' content='text/htm;charset=utf-8' /> <style type="text/css"> * {margin:0; padding:0;} body {background-color:#fff} dl, dd {margin:20px;} .color_1 {color:#F7941D; border:1px solid #F7941D;} .color_2 {color:#f00; border:1px solid #f00;} .color_3 {color:#01FE34; border:1px solid #01FE34;} .color_4 {color:#F49AC1; border:1px solid #F49AC1;} .color_5 {color:#00AEEF; border:1px solid #00AEEF;} .color_6 {color:#DB00EF; border:1px solid #DB00EF;} .color_7 {color:#00CCFD; border:1px solid #00CCFD;} </style> </head> <body> <script type='text/javascript'> /** * * * @param {HTMLElement} el * @param {String} where beforeBegin、afterBegin、beforeEnd、afterEnd * @param {String} html */ function insertHTML(el, where, html) { if (!el) { return false; } where = where.toLowerCase(); if (el.insertAdjacentHTML) {//IE el.insertAdjacentHTML(where, html); } else { var range = el.ownerDocument.createRange(), frag = null; switch (where) { case "beforebegin": range.setStartBefore(el); frag = range.createContextualFragment(html); el.parentNode.insertBefore(frag, el); return el.previousSibling; case "afterbegin": if (el.firstChild) { range.setStartBefore(el.firstChild); frag = range.createContextualFragment(html); el.insertBefore(frag, el.firstChild); } else { el.innerHTML = html; } return el.firstChild; case "beforeend": if (el.lastChild) { range.setStartAfter(el.lastChild); frag = range.createContextualFragment(html); el.appendChild(frag); } else { el.innerHTML = html; } return el.lastChild; case "afterend": range.setStartAfter(el); frag = range.createContextualFragment(html); el.parentNode.insertBefore(frag, el.nextSibling); return el.nextSibling; } } } function btnHandler() { var elem = document.getElementById('abc'); insertHTML(elem, 'beforeBegin', '<dd class="color_2">上一个兄弟节点previousSibling</dd>'); insertHTML(elem, 'beforeEnd', '<dd class="color_3">最后一个节点lastChild</dd>'); insertHTML(elem, 'afterBegin', '<dd class="color_4">第一个节点firstChild</dd>'); insertHTML(elem, 'afterEnd', '<dd class="color_5">下一个兄弟节点nextSibling</dd>'); } </script> <button onclick="btnHandler();">insertAdjacentHTML</button> <dl class="color_1" id="abc"> <dd><a href="#">今天采访出来,天上下雨,那个偏僻的地方根本没出租车的影子</a></dd> <dd><a href="#">今天采访出来,天上下雨,那个偏僻的地方根本没出租车的影子</a></dd> <dd><a href="#">今天采访出来,天上下雨,那个偏僻的地方根本没出租车的影子</a></dd> <dd><a href="#">今天采访出来,天上下雨,那个偏僻的地方根本没出租车的影子</a></dd> <dd><a href="#">今天采访出来,天上下雨,那个偏僻的地方根本没出租车的影子</a></dd> </dl> </body> </html>
运行示例查看效果: