摘要：
let date = new Date('2014-04-23 18:55:49:123'); // 有三种方式获取 let time1 = date.getTime(); let time2 = date.valueOf(); lettime3 = Date.parse(date); consol 阅读全文
摘要：
Math.floor(5.55) //向下取整 结果为5 Math.floor(5.99) //向下取整 结果为5 Math.ceil(5.21) //向上取整，结果为6 Math.ceil(5.88) //向上取整，结果为6 Math.round(5.78) //四舍五入 结果为6 Math.ro 阅读全文