var formatNumber = numStr => {
numStr += '';
x = numStr.split('.');
x1 = x[0];
x2 = x.length > 1 ? '.' + x[1] : '';
var rgx = /(\d+)(\d{3})/;
while (rgx.test(x1)) {
x1 = x1.replace(rgx, '$1' + ',' + '$2');
}
return x1 + x2;
}
formatNumber(10000000000); // "10,000,000,000"
更新 toLocaleString js原生支持数滋格式化
let num =10000000000
num.toLocaleString() // '10,000,000,000'
