架构师之正则表达式(六)-------实现字符串按照字数换行(即字符串插入操作)

1.前言.
如题.
2.代码.

<script type="text/javascript">
var name="jjjjjj哈哈jjjjjjjjjjjjjddddddddddddddddddddkkkkkkkkkkkkkkkkkk";
name=name.replace(/([^\n]{20})/g,"$1\n");
alert(name);
</script>

3.注意. ^\n代表你要插入的字符,这个是"不包含换行符"的意思 .