ahjesus 返回光标位置兼容IE,FF和Chrome,
说明更新(2013-04-24){
今天收到反馈说这个例子没作用了,经过查证测试发现是因为使用的jquery的版本过高引起的
$(element).attr("tagName") 这个是非官方的用法 所以版本变化会有影响 如果要使用更高版本jquery,获取tagName改成原生就可以了
或者调整其他获取tagName的方式
}
网上苦找2小时,全是不能兼容FF的,看来这种东西网上是搞不到现成的了,只能自己动手丰衣足食
现在发布出来,今后网上就有现成的供人使用了。
为了省事,少量位置用了jquery 改原生JS也很方便,谁需要就请自己修改了。
欢迎各位路过高人拍板,欢迎各位留言提供改进代码。
又改进 兼容了Chrome 下面的代码已修改成最新版
上源码了
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>js获取div编辑框,textarea,input text的光标位置,兼容FF和IE</title> <script src="jquery-1.4.4.js" type="text/javascript"></script> <script type="text/javascript"> //去除左右所有空格 String.prototype.trim = function () { return this.replace(/(^s*)|(s*$)/g, ""); } function getPosition(element) { var OsObject = ""; if (navigator.userAgent.indexOf("MSIE") > 0) { OsObject = "MSIE"; } if (navigator.userAgent.indexOf("Firefox") > 0) { OsObject = "Firefox"; } if (navigator.userAgent.indexOf("Safari") > 0) { OsObject = "Safari"; } if (navigator.userAgent.indexOf("Camino") > 0) { OsObject = "Camino"; } if (navigator.userAgent.indexOf("Gecko") > 0) { OsObject = "Gecko"; } if (navigator.userAgent.indexOf("Chrome") > 0) { OsObject = "Chrome"; } var result = 0; if (!document.selection) { //非IE浏览器 var thisTagName = null; if ($(element).attr("tagName") != "TEXTAREA" && $(element).attr("tagName") != "INPUT") { if ($(element).attr("tagName") == "DIV" && $(element).attr("contenteditable") == "true") { thisTagName = window.getSelection().anchorNode.parentElement.tagName; } //出自http://www.cnblogs.com/ahjesus 尊重作者辛苦劳动成果,转载请注明出处,谢谢! else { thisTagName == null; } } else { if ($(element).attr("tagName") == "INPUT" && $(element).attr("type") == "text") { thisTagName = window.getSelection().anchorNode.tagName; } else { console.log(window.getSelection()); thisTagName = window.getSelection().anchorNode.tagName; } } console.log(thisTagName); if (thisTagName == "TEXTAREA" || thisTagName == "INPUT" || (thisTagName=="BODY"&&OsObject == "Chrome")) { result = element.selectionStart } //出自http://www.cnblogs.com/ahjesus 尊重作者辛苦劳动成果,转载请注明出处,谢谢! else if (thisTagName != null) { if (thisTagName == element.tagName) { if (window.getSelection().anchorNode.textContent == $(element).text()) { result = window.getSelection().anchorOffset; } else { var currentIndex = window.getSelection().anchorOffset; var txt = ""; var txtoo = window.getSelection().anchorNode.previousSibling; while (txtoo != null) { txt += txtoo.textContent; txtoo = txtoo.previousSibling; } //出自http://www.cnblogs.com/ahjesus 尊重作者辛苦劳动成果,转载请注明出处,谢谢! result = txt.length + currentIndex; } } else { var currentIndex = window.getSelection().anchorOffset; var txt = ""; var txtoo = window.getSelection().anchorNode.parentElement.previousSibling; while (txtoo != null) { txt += txtoo.textContent; txtoo = txtoo.previousSibling; } result = txt.length + currentIndex; } } //出自http://www.cnblogs.com/ahjesus 尊重作者辛苦劳动成果,转载请注明出处,谢谢! else { return 0; } } else { //IE var rng; if ($(element).attr("tagName") == "TEXTAREA" || ($(element).attr("tagName") == "INPUT" && $(element).attr("type") == "text") || ($(element).attr("tagName") == "DIV" && $(element).attr("contenteditable") == "true")) { element.focus(); rng = document.selection.createRange(); rng.moveStart('character', -element.innerText.length); var text = rng.text; for (var i = 0; i < element.innerText.length; i++) { if (element.innerText.substring(0, i + 1) == text.substring(text.length - i - 1, text.length)) { result = i + 1; } } } //出自http://www.cnblogs.com/ahjesus 尊重作者辛苦劳动成果,转载请注明出处,谢谢! else { return 0; } } return result; } function getValue(element) { var pos = getPosition(element); document.getElementById("pnum").value = pos; } </script> <style type="text/css"> #Div1, #Div2 { width: 500px; height: 100px; border: solid 1px black; } </style> </head> <body> <input id="pnum" type="text" value="Hello,wellcome to test! 你好,欢迎测试!" onmouseup="getValue(this)" style="display: block" /> <textarea cols="60" rows="10" onkeyup="getValue(this)" onmouseup="getValue(this)">Hello,wellcome to test! 你好,欢迎测试! 注意源代码开闭合标记之间不能换行,否则统计错误!</textarea> <div id="Div1" onclick="getValue(this);" onkeyup="getValue(this);" contenteditable="true">一二三<span>四五</span>六七八<span>九零</span> 注意源代码开闭合标记之间不能换行,否则统计错误!注意div编辑框源码里面是嵌套有其他标签的,可以正常返回正确位置!</div> <br /> <div id="Div2" onclick="getValue(this);" onkeyup="getValue(this);">一二三四五六<span>七八</span></div> </body> </html>