replace
str.replace(/</?[^>]*>/g,''); //去除HTML tag，g代表去除所有
str.replace(/[ | ]*
/g,'
'); //去除行尾空白
str.replace(/
[s| | ]*
/g,'
'); //去除多余空行
str.replace(/ /ig,'');//去掉
str.replace(/^[s ]+|[s ]+$/g, "");//去掉全角半角空格
str.replace(/[
]/g,"");//去掉回车换行
str.replace(/(^/s*)|(/s*$)/g, ""); // 去掉左右空格
str.replace(/(^/s*)/g, ""); // 去掉左空格
str.replace(/(/s*$)/g, ""); // 去掉右空格
join
arr=["1","1","1","1"];
str=arr.join(","); //str=1,1,1,1
split
str="1,1,1,1";
arr=str.split(","); //["1","1","1","1"];