如何使用jQuery在每200个字符后插入一个换行符 [英] How to insert a newline character after every 200 characters with jQuery

问题描述

我有一个用于插入一些信息的文本框。我想使用jQuery或JavaScript在每200个字符后插入一个换行符。

I have a textbox that I use to insert some information. I want to insert a newline character after every 200 characters using jQuery or JavaScript.

例如：

aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa

在这个例子中，我想在每200个字符后插入换行符。我该怎么做？

In this example, I want to insert a newline chracter after every 200 characters. How can I do this?

推荐答案

每隔200个字符后断字符串，添加换行符，然后用剩余的字符重复此过程string：

Break the string after every 200 characters, add a newline, and repeat this process with the remaining string:

function addNewlines(str) {
  var result = '';
  while (str.length > 0) {
    result += str.substring(0, 200) + '\n';
    str = str.substring(200);
  }
  return result;
}

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