Question

我想从

中删除新行周围的任何空格

Here is a new line. /n 
New line.

到

Here is a new line./n
New line.

我找到了各种示例，如何删除空格，以及如何删除新行，但不是如何用简单/ n替换'+ / n'。我尝试过以下但是没有用：

paragraphs = paragraphs.replace(/(\r\n|\n|\r|' '+\n|' '+\r|\n+' '|\r+' ')/gm,'<br>');

更新：

这就是我如何解决它： paragraph = paragraphs.replace（/ \ r \ n | \ n | \ r \ n / gm，'\ n'）; //清除空元素数组（双新行） paragraph = $ .grep（paragraph，function（n）{return（n）}）; //清除所有双空格的文本 for（p = 0; p

Answer 1

我没有看到问题，以下不起作用吗？

var paragraph = "my paragraph with a space at the end \nand a new line";
paragraph.replace(/ \n/, "\n");

// or with multiple spaces, this is working too:
paragraph = "my paragraph with lot of spaces    \nzzzzz".replace(/ +\n/, "\n");

// or, for the more complete regex you want 
paragraphs = paragraphs.replace(/ [ \r\n]+/gm, "\n");

Answer 2

可能是你可以用\ n分割字符串并应用jQuery.trim（）

Answer 3

paragraphs = paragraphs.replace(/\ +\n/g,'\n');

Answer 4

试试这个：

HTML：

<div id="myDiv">
    Here is a new line.   /n
    New line.
</div>

javaScript：

//get the innerHTML
var paragraph = document.getElementById("myDiv").innerHTML;
//extract the part that you want to replace using RegExp.exec() method
var newPart = /[ ]*\/n/.exec(paragraph);
//simply replace the new part with what you want
paragraph = paragraph.replace(newPart, '/n');
alert(paragraph);

Demo

Answer 5

您使用的RegExp，/(\r\n|\n|\r|' '+\n|' '+\r|\n+' '|\r+' ')/gm 没有按照你的意图行事; '+部分匹配1 + '个字符; 匹配单个空格字符只需键入空格（不含撇号）你应该这样说（如果我错了，请纠正我）：/\r\n|\s+\n|\s+\r|\n+|\r+/g并像这样使用它：p.replace(/\r\n|\s+\n|\s+\r|\n+|\r+/g,"\n<br>")，或尝试这个函数：

//
var ws_nls_ws_2_nl =
( function ( sc, ws_nls_ws_rgx, str_trim_rgx, nl ) {
  return function ( input_txt ) {
    // split on "\n+" surounded by blanks
    // join with "\n"
    // trim the result string
    return sc( input_txt ).split( ws_nls_ws_rgx ).join( nl ).replace( str_trim_rgx, "" );
  };
} )(

  // get global String ctor
  ( function () { return String; } )(),

  // new line(s) with blanks around it, global
  /[\s\uFEFF\xA0]+(?:\n+|(?:\r\n)+|\r+)[\s\uFEFF\xA0]+/g,

  // str-trim reg, 
  // blanks at start or end
  /^[\s\uFEFF\xA0]+|[\s\uFEFF\xA0]+$/g,

  "\n"

);
//
//  ws_nls_ws_2_nl("        Here is a new line.  \n   New line.   ");
//
//

Answer 6

好吧，这就是我最终清理输入文本字段的方式：

function cleanText(){
//aligns all new lines and splits text into single paragraphs
paragraphs = input.replace(/\r\n|\n|\r/gm,'\n');
paragraphs = paragraphs.split('\n');
// clears array of empty elements (double new lines)
paragraphs = $.grep(paragraphs,function(n){ return(n) });
// clears text of all double whitespaces
for (p=0;p<paragraphs.length; p++){
    paragraphs[p] = paragraphs[p].replace(/\s+/g, ' ');
    paragraphs[p] = $.trim(paragraphs[p]);
}
// joins everything to one string
var cleanedText = paragraphs.join("\n ") ;
// gets an array of single words
wordsArray=cleanedText.split(' ');
}

在javascript中替换空格和换行符

6 个答案: