检查字符串是否包含换行符

So, I have to get HTML of textarea and check whether it contains line break. How can i see whether it contain \n because the string return using val() does not contain \n and i am not able to detect it. I tried using .split("\n") but it gave the same result. How can it be done ?

所以,我必须得到textarea的HTML并检查它是否包含换行符。我怎么能看到它是否包含\ n因为使用val()返回的字符串不包含\ n而且我无法检测到它。我尝试使用.split(“\ n”),但它给出了相同的结果。如何做呢 ?

One minute, IDK why when i add \n to textarea as value, it breaks and move to next line.

一分钟,IDK为什么当我将\ n添加到textarea作为值时,它会中断并移动到下一行。

2 个解决方案

#1

Line breaks in HTML aren't represented by \n or \r. They can be represented in lots of ways, including the   element, or any block element following another (, for instance).

HTML中的换行符不用\ n或\ r表示。它们可以用很多方式表示,包括
元素,或者跟随另一个元素的任何块元素(例如

)。

If you're using a textarea, you may find \n or \r (or \r\n) for line breaks, so:

如果你正在使用textarea,你可能会发现\ n或\ r \ n(或\ r \ n)换行符,所以:

var text = $("#theTextArea").val();
var match = /\r|\n/.exec(text);
if (match) {
    // Found one, look at `match` for details, in particular `match.index`
}

Live Example | Source

实例|资源

...but that's just textareas, not HTML elements in general.

...但这只是textareas,而不是一般的HTML元素。

#2

var text = $('#total-number').text();
var eachLine = text.split('\n');
  alert('Lines found: ' + eachLine.length);
  for(var i = 0, l = eachLine.length; i < l; i++) {
      alert('Line ' + (i+1) + ': ' + eachLine[i]);
  }

#1