数字金额千分位格式化(小技巧)

var num = 23455678;
var num1 = 23455678.12;

var formatNum = num.toLocaleString('en-US');
var formatNum1 = num1.toLocaleString('en-US');

console.log(formatNum); // 23,455,678
console.log(formatNum1); // 23,455,678.123var n