需要用到的知识点

var myDate = new Date(); myDate.getYear(); //获取当前年份(2位) myDate.getFullYear(); //获取完整的年份(4位,1970-????) myDate.getMonth(); //获取当前月份(0-11,0代表1月) myDate.getDate(); //获取当前日(1-31) myDate.getDay(); //获取当前星期X(0-6,0代表星期天) myDate.getTime(); //获取当前时间(从1970.1.1开始的毫秒数) myDate.getHours(); //获取当前小时数(0-23) myDate.getMinutes(); //获取当前分钟数(0-59) myDate.getSeconds(); //获取当前秒数(0-59) myDate.getMilliseconds(); //获取当前毫秒数(0-999)

一、获取当前时间，精确到毫秒 console.log("时间节点1:"+getNowTime());//时间节点1:2021-4-24 10:54:13.904 function  getNowTime() {     var date = new Date();     this.year = date.getFullYear();     this.month = date.getMonth() + 1;     this.date = date.getDate();     this.hour = date.getHours() < 10 ? "0" + date.getHours() : date.getHours();     this.minute = date.getMinutes() < 10 ? "0" + date.getMinutes() : date.getMinutes();     this.second = date.getSeconds() < 10 ? "0" + date.getSeconds() : date.getSeconds();     this.milliSeconds = date.getMilliseconds();     var currentTime = this.year+'-'+this.month + '-' + this.date + ' ' + this.hour + ':' + this.minute + ':' + this.second + '.' + this.milliSeconds;     return currentTime; };