js数值转换为3位逗号分隔的示例代码

if(strNum.length<=3){

returnstrNum;

}

if(!/^(\+|-)?(\d+)(\.\d+)?$/.test(strNum)){

returnstrNum;

}

vara=RegExp.$1,b=RegExp.$2,c=RegExp.$3;

varre=newRegExp();

re.compile("(\\d)(\\d{3})(,|$)");

while(re.test(b)){

b=b.replace(re,"$1,$2$3");

}

returna+""+b+""+c;

}