我需要将插入符号移动到contenteditable节点的末端,例如在Gmail注释小部件上。
contenteditable
我在StackOverflow上阅读了线程,但是这些解决方案基于使用输入,并且不适用于contenteditable元素。
还有另一个问题。
如果的解决方案工作contenteditableDIV不包含其他元素multilined。
例如,如果一个div包含其他div,而这些其他div里面包含其他内容,则可能会出现一些问题。
为了解决这些问题,我安排了以下解决方案,它是对Nico的解决方案的改进:
//Namespace management idea from http://enterprisejquery.com/2010/10/how-good-c-habits-can-encourage-bad-javascript-habits-part-1/ (function( cursorManager ) { //From: http://www.w3.org/TR/html-markup/syntax.html#syntax-elements var voidNodeTags = ['AREA', 'BASE', 'BR', 'COL', 'EMBED', 'HR', 'IMG', 'INPUT', 'KEYGEN', 'LINK', 'MENUITEM', 'META', 'PARAM', 'SOURCE', 'TRACK', 'WBR', 'BASEFONT', 'BGSOUND', 'FRAME', 'ISINDEX']; //From: https://stackoverflow.com/questions/237104/array-containsobj-in-javascript Array.prototype.contains = function(obj) { var i = this.length; while (i--) { if (this[i] === obj) { return true; } } return false; } //Basic idea from: https://stackoverflow.com/questions/19790442/test-if-an-element-can-contain-text function canContainText(node) { if(node.nodeType == 1) { //is an element node return !voidNodeTags.contains(node.nodeName); } else { //is not an element node return false; } }; function getLastChildElement(el){ var lc = el.lastChild; while(lc && lc.nodeType != 1) { if(lc.previousSibling) lc = lc.previousSibling; else break; } return lc; } //Based on Nico Burns's answer cursorManager.setEndOfContenteditable = function(contentEditableElement) { while(getLastChildElement(contentEditableElement) && canContainText(getLastChildElement(contentEditableElement))) { contentEditableElement = getLastChildElement(contentEditableElement); } var range,selection; if(document.createRange)//Firefox, Chrome, Opera, Safari, IE 9+ { range = document.createRange();//Create a range (a range is a like the selection but invisible) range.selectNodeContents(contentEditableElement);//Select the entire contents of the element with the range range.collapse(false);//collapse the range to the end point. false means collapse to end rather than the start selection = window.getSelection();//get the selection object (allows you to change selection) selection.removeAllRanges();//remove any selections already made selection.addRange(range);//make the range you have just created the visible selection } else if(document.selection)//IE 8 and lower { range = document.body.createTextRange();//Create a range (a range is a like the selection but invisible) range.moveToElementText(contentEditableElement);//Select the entire contents of the element with the range range.collapse(false);//collapse the range to the end point. false means collapse to end rather than the start range.select();//Select the range (make it the visible selection } } }( window.cursorManager = window.cursorManager || {}));
用法:
var editableDiv = document.getElementById("my_contentEditableDiv"); cursorManager.setEndOfContenteditable(editableDiv);
这样,游标肯定会定位在最后一个元素的末尾,并最终嵌套。
编辑#1 :为了更通用,while语句还应该考虑所有其他不能包含文本的标记。这些元素被称为 void元素 ,在这个问题上,有一些方法可以测试元素是否为void。因此,假设存在一个调用的函数canContainText,true如果参数不是void元素,则该函数返回以下代码行:
canContainText
true
contentEditableElement.lastChild.tagName.toLowerCase() != 'br'
应替换为:
canContainText(getLastChildElement(contentEditableElement))
编辑#2 :上面的代码已完全更新,描述和讨论的每个更改