toLocalString()方法

var number = 3500;

console.log(number.toLocaleString()); //3,500 返回使用默认的语言环境和默认选项格式化的字符串

var value = 13565.233

parseFloat(value.toFixed(2)).toLocaleString()//将浮点数转换为格式化字符串

格式化时间
var time = new Date();

console.log(time.toString()); //"Wed Nov 04 2020 09:03:33 GMT+0800 (中国标准时间)"

console.log(time.toLocaleString());//"2020/11/4 上午9:03:33"

console.log(time.toLocaleTimeString());//"上午9:03:33"

console.log(time.toLocaleDateString());//"2020/11/4"