js金额千分位保留3位小数，不足补0

function number_format(number, decimals, dec_point, thousands_sep) {            /*            * 参数说明：            * number：要格式化的数字            * decimals：保留几位小数            * dec_point：小数点符号            * thousands_sep：千分位符号            * */            number = (number + '').replace(/[^0-9+-Ee.]/g, '');            var n = !isFinite(+number) ? 0 : +number,                prec = !isFinite(+decimals) ? 0 : Math.abs(decimals),                sep = (typeof thousands_sep === 'undefined') ? ',' : thousands_sep,                dec = (typeof dec_point === 'undefined') ? '.' : dec_point,                s = '',                toFixedFix = function (n, prec) {                    var k = Math.pow(10, prec);                    return '' + Math.ceil(n * k) / k;                };                     s = (prec ? toFixedFix(n, prec) : '' + Math.round(n)).split('.');            var re = /(-?\d+)(\d{3})/;            while (re.test(s[0])) {                s[0] = s[0].replace(re, "$1" + sep + "$2");            }                     if ((s[1] || '').length < prec) {                s[1] = s[1] || '';                s[1] += new Array(prec - s[1].length + 1).join('0');            }            return s.join(dec);        }

 

使用方法：

1 var num=number_format(1234567.0891, 3, ".", ",");//1,234,567.089

转载于:https://www.cnblogs.com/xiaoQ0725/p/8963212.html

相关资源：JavaScript 格式化数字、金额、千分位、保留几位小数、舍入舍去