侦测 和空间与JavaScript [英] Detect   and space with JavaScript

问题描述

我正在尝试读取contentEditable div的内容并提取当前活动的单词. IE.刚输入的单词或已修改的单词.

I'm trying to read the content of a contentEditable div and extract the currently active word. ie. the word which was just entered or one which was modified.

我最初的方法是:

1. 将字符串作为innerHTML
2. 使用函数获取光标位置(现在我可以找到被修改的单词)
3. 向后读取，直到找到一个空格(通过字符比较来查找字符)
4. 从找到的空间中提取单词.

1. get string as innerHTML
2. get cursor position using a function (now I can find the word that was modified)
3. read backwards till a space is found (character by character comparison)
4. extract the word from the point of space found.

但是问题是浏览器有时将空格转换为 ，有时却不(如果只有一个空格，这没有问题).然后，我决定使用第二个循环读取5个字符(如果找到了a ;)并对此进行检查.但这似乎效率很低.那么有没有更好的方法可以做到这一点?

But the problem is that the browser sometimes converts the spaces to   and sometimes doesn't (There is no problem if there is only one space). Then I decided to using a second loop to read in 5 chars if a ; is found and check against that. But this is seems very inefficient. So is there a better way to do this?

推荐答案

我找到了一种解决方法.以前，我是使用innerHTML来获取内容的. 现在，我正在使用targ.firstChild.nodeValue，其中targ是需要其内容的元素.然后使用 str.charCodeAt(i)==32 || str.charCodeAt(i)==160 进行检查.

I found a workaround. Previously, I was using innerHTML to get the contents. Now, I'm using targ.firstChild.nodeValue where targ is the element whose content is needed.Then checking with str.charCodeAt(i)==32 || str.charCodeAt(i)==160 .

这很好.

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