jQuery javascript regex用\n替换。

How do i write a regex to replace   or   with \n. I'm trying to move text from div to textarea, but don't want  's to show in the textarea, so i want to replace then with \n.

如何编写regex以替换
或
与\n。我尝试将文本从div移动到textarea，但是不要让
's显示在textarea中，所以我想用\n替换。

5 个解决方案

#1

142

var str = document.getElementById('mydiv').innerHTML;
document.getElementById('mytextarea').innerHTML = str.replace(/<br\s*[\/]?>/gi, "\n");

or using jQuery:

或使用jQuery:

var str = $("#mydiv").html();
var regex = /<br\s*[\/]?>/gi;
$("#mydiv").html(str.replace(regex, "\n"));

example

例子

edit: added i flag

编辑:添加我国旗

edit2: you can use /<br[^>]*>/gi which will match anything between the br and slash if you have for example  

edit2:您可以使用/ < br[^ >]* > / gi将匹配任何br和削减之间如果有例如< br类= "清晰" / >

#2

myString.replace(/ /g, "\n")

myString。替换(/ / g,“\ n”)

#3

a cheap and nasty would be:

廉价而肮脏的是:

~~jQuery("#myDiv").html().replace(" ", "\n").replace(" ", "\n")~~

EDIT

编辑

jQuery("#myTextArea").val(
    jQuery("#myDiv").html()
        .replace(/\<br\>/g, "\n")
        .replace(/\<br \/\>/g, "\n")
);

Also created a jsfiddle if needed: http://jsfiddle.net/2D3xx/

还在需要时创建了jsfiddle: http://jsfiddle.net/2D3xx/。

#4

True jQuery way if you want to change directly the DOM without messing with inner HTML:

真正的jQuery方法，如果您想直接更改DOM而不影响内部HTML:

~~$('#text').find('br').prepend(document.createTextNode('\n')).remove();~~

$(" #文本”);(br).prepend(document.createTextNode(' \ n ')).remove();

Prepend inserts inside the element, before() is the method we need here:

在元素内的Prepend插入，之前()是我们需要的方法:

$('#text').find('br').before(document.createTextNode('\n')).remove();

Code will find any elements, insert raw text with new line character and then remove the elements.

代码将找到任何
元素，插入原始文本和新的行字符，然后删除
元素。

This should be faster if you work with long texts since there are no string operations here.

如果您使用长文本，这应该更快，因为这里没有字符串操作。

To display the new lines:

显示新线路:

$('#text').css('white-space', 'pre-line');

#5

Not really anything to do with jQuery, but if you want to trim a pattern from a string, then use a regular expression:

与jQuery无关，但如果想从字符串中裁剪模式，则使用正则表达式:

<textarea id="ta0"></textarea>
<button onclick="
  var ta = document.getElementById('ta0');
  var text = 'some<br>text<br />to<br/>replace';
  var re = /<br *\/?>/gi;
  ta.value = text.replace(re, '\n');
">Add stuff to text area</button>

#1

142

var str = document.getElementById('mydiv').innerHTML;
document.getElementById('mytextarea').innerHTML = str.replace(/<br\s*[\/]?>/gi, "\n");