整数缝三

function fnInttrunt(number) {　　let intPart = Number(number)|0; //获取整数部分   return  intPart.toString().replace(/(\d)(?=(?:\d{3})+$)/g, '$1,')}

小数逢三

function fnfloattrunt(number) {　　let intPart = Number(number);    return  intPart.toString().replace(/\d(?=(\d{3})+\.)/g,'$&,');}