浏览器中的Javascript Regex Substitution换行处理 [英] Javascript Regex Substitution newline handling in browsers

问题描述

我创建了一个html文本区域，该区域可以在其中输入的任何文本的开头和结尾添加"["和]".

I created a html textarea with a capability to add "[" and "]" at the beginning and end of whatever text has been entered within that.

我的问题是，当我在文本区域中输入一些多行数据时，正则表达式在ff和ie中的处理方式有所不同.

My problem is, when I enter some multiline data into the textarea, the regex is handled differently in ff and ie.

输入:

Iam
learning
regex

预期的输出:(我在FF中得到了

Expected Output: (I get this in FF )

[Iam]
[learning]
[regex]

IE中的输出:

[Iam
][]
[learning
][]
[regex]

正则表达式代码在这里:

The Regex code is here:

(textareaIDelement.value).replace(/(^)(.*)(\n{0,})($)/gm, "[" + "$2" +"]");

我在正则表达式中添加了(\n{0,})以匹配换行符..但是它没有任何作用..

I added the (\n{0,}) in the regex to match newlines.. but it doesn't have any effect..

谢谢

推荐答案

在IE中，textarea的value属性中的行分隔符为\r\n.在所有其他主要浏览器中，它都是\n.一个简单的解决方案是首先将行分隔符归一化为\n.我还简化了正则表达式:

In IE, the line separator in a textarea's value property is \r\n. In all other major browsers it's \n. A simple solution would be to normalize line separators into \n first. I've also simplified the regex:

textareaIDelement.value.replace(/\r\n/g, "\n").replace(/^(.*)\n*$/gm, "[$1]");

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